This list, even on the day I'm publishing it, I could add multiple new things. (Say like the retaliation against Vindman). Pretty much every day there is something worthy of his removal.
I believe impeachment was necessary. The Democrats had no other alternative in the face of abuse of power in interfering with the election. It was also necessary for Republicans to go on record on their position. No weaseling out of it. With one exception they showed they are the party of Trump. That there is no depth they will not sink to, to support their obviously corrupt leader. Including holding a sham trial presided over by the Chief Justice of the Supreme Court no less. This shows several disturbing things - that our government and it's checks and balances are no longer working. The rule of law does not apply. That the constitution as an amazing document as it is didn't foresee this degree of bad faith actors across different parts of the government.
Some people may think - "okay it's really bad, but voting in 2020 will fix it". There are so many holes in this view. With the Senate Republicans disgraceful actions something that was a possibility is now being spoken about openly - that even if Trump loses it is quite possible he won't step down. Whatever the outcome it will be contested. Why is this now plausible? Republicans have shown via the Impeachment they are shameless. They do not care about the constitution, the rule of law, or pretty much anything else except their own power and/or hiding dirty secrets. Secondly if Trump gets removed there is a good chance he's going to go to jail without the protection of being president. That being the case what do you think he's going to do?
The list was cribbed from a post on reddit. I repeat it here to remind myself of how bad things are. Some items are worse than others for sure. In normal times a tiny percentage of this list would be enough for somebody to be removed.
Unqualified: https://www.vox.com/policy-and-politics/2016/11/11/13587532/donald-trump-no-experience
Draft dodging: https://www.usatoday.com/story/news/politics/onpolitics/2018/12/27/trump-vietnam-war-bone-spur-diagnosis/2420475002/
Gold star family disrespecting: https://www.nytimes.com/2016/07/31/us/politics/donald-trump-khizr-khan-wife-ghazala.html
POW attacking: https://www.npr.org/sections/thetwo-way/2015/07/18/424169549/trump-lashes-out-at-mccain-i-like-people-who-werent-captured
US General insulting: https://www.militarytimes.com/news/pentagon-congress/2020/01/17/trump-blasted-top-military-generals-as-a-bunch-of-dopes-and-babies-according-to-new-book/
Racist: https://www.theatlantic.com/magazine/archive/2019/06/trump-racism-comments/588067/
Vulgar: https://www.nytimes.com/2016/10/08/us/donald-trump-tape-transcript.html
Confirmed sexual assaulting: https://www.nytimes.com/2016/10/08/us/donald-trump-tape-transcript.html
Trillion dollars to the rich tax cutting: https://budget.house.gov/publications/publication/gop-tax-law-showers-benefits-wealthy-and-large-corporations-while
Own daughter creeping: https://www.independent.co.uk/news/world/americas/us-elections/donald-trump-ivanka-trump-creepiest-most-unsettling-comments-a-roundup-a7353876.html
Wife cheating with a pornstar after birth of son and paying for campaign-finance-violating silencing: https://www.bbc.com/news/world-us-canada-43334326
$413 million dollar inheritance getting: https://www.washingtonpost.com/news/monkey-cage/wp/2018/10/04/the-new-york-times-revealed-how-fred-trump-funneled-413-million-to-his-son-donald-will-that-change-american-opinion/
Teen pageant dressing room invading: https://www.politifact.com/wisconsin/article/2016/oct/18/allegations-about-donald-trump-and-miss-teen-usa-c/
Baby and mother separating: https://www.nytimes.com/2019/06/14/the-weekly/trump-immigration-border-separation-family.html
Breast feeding mother shaming: https://www.parents.com/baby/all-about-babies/fighting-words-donald-trump-called-a-breastfeeding-mom-disgusting/
Fat-shaming while being fat: http://nymag.com/intelligencer/2019/08/trump-fat-shames-own-supporter-frank-dawson-new-hampshire-rally.html
17 women accusing him of sexual assaulting: https://abcnews.go.com/Politics/list-trumps-accusers-allegations-sexual-misconduct/story?id=51956410
Accusers are not attractive enough for him to assault implying: https://www.vanityfair.com/news/2016/10/donald-trump-insults-accusers-ugly
University student defrauding: https://abcnews.go.com/US/judge-finalizes-25-million-settlement-victims-donald-trumps/story?id=54347237
Bankrupt casino causing: https://www.washingtonpost.com/politics/2016/live-updates/general-election/real-time-fact-checking-and-analysis-of-the-first-presidential-debate/fact-check-has-trump-declared-bankruptcy-four-or-six-times/
Kids cancer charity stealing: https://www.forbes.com/sites/danalexander/2019/12/23/best-stories-of-the-decade-how-donald-trump-shifted-kids-cancer-charity-money-into-his-business/
Taped detailed accusation of rape of a minor having: https://www.snopes.com/news/2016/06/23/donald-trump-rape-lawsuit/
Wife-beating: https://www.newyorker.com/magazine/2016/10/24/documenting-trumps-abuse-of-women
Popular vote losing: https://www.independent.co.uk/news/world/americas/us-elections/donald-trump-lost-popular-vote-hillary-clinton-us-election-president-history-a7470116.html
Anti-vaxxing: https://mobile.twitter.com/realdonaldtrump/status/449525268529815552?lang=en
Christianity-faking: https://www.kentucky.com/opinion/op-ed/article216494035.html
Publicist impersonating: https://www.usatoday.com/story/news/politics/onpolitics/2016/05/13/donald-trump-people-magazine-washington/84333614/
Tax dodging: https://www.vox.com/policy-and-politics/2018/10/2/17929774/donald-trump-tax-evasion-fred-trump-new-york-times
Friends’ wives pursuing: https://www.independent.co.uk/news/world/americas/us-politics/donald-trump-sex-friends-wives-are-book-claims-true-michael-wolff-fire-fury-white-house-bannon-a8142011.html
1st ever same-party impeachment vote receiving: https://abcnews.go.com/Politics/invoking-faith-emotional-mitt-romney-announces-hell-vote/story?id=68779768
Foreign aid bribing: https://www.bbc.com/news/world-us-canada-49800181
1/3 of the presidency golf playing: https://www.washingtonpost.com/politics/2019/12/30/nearly-third-days-hes-been-president-trumps-visited-trump-branded-property/
"Enemy of the people” free-press assaulting: https://www.vox.com/policy-and-politics/2018/10/29/18037894/donald-trump-twitter-media-enemy-pittsburgh
Hannity coordinating: https://www.buzzfeednews.com/article/emmaloop/sean-hannity-trump-allies-mueller-memos-fox-news
Cambridge Analytica using: https://www.wired.com/story/what-did-cambridge-analytica-really-do-for-trumps-campaign/
Ivanka is a “piece of ass” approving: https://www.politico.com/story/2016/10/trump-ivanka-piece-of-ass-howard-stern-229376
Loan application asset inflating: https://www.nytimes.com/2019/02/27/business/donald-trump-buffalo-bills-deutsche-bank.html
Historically low polling: https://theweek.com/speedreads/890683/trumps-approval-rating-pace-lowest-ever-among-independents-gallup-poll-shows
College achievement faking: https://www.forbes.com/sites/christopherrim/2019/02/28/heres-why-donald-trump-doesnt-want-anyone-to-know-his-grades-or-sat-scores/
Unqualified judge appointing: https://news.bloomberglaw.com/us-law-week/confirmation-expected-for-another-unqualified-trump-judge-pick
Unqualified cabinet member appointing: https://www.latimes.com/local/education/la-me-eli-broad-opposes-devos-20170201-story.html
9/11 victims funds immorally accepting: https://fortune.com/2016/05/29/trump-911-grant/
Christianity Today verbal-thrashing receiving: https://www.christianitytoday.com/ct/2019/december-web-only/trump-should-be-removed-from-office.html
Chronically-ill infant nephew inheritance-cutting then medical coverage canceling: https://www.theatlantic.com/politics/archive/2016/09/donald-trumps-cruel-streak/501554/
Criminals Flynn Cohen Manafort Papadopolous and Stone hiring: https://www.washingtonexaminer.com/news/analysis-roger-stone-the-latest-headed-to-jail-under-the-harsh-spotlight-reflecting-off-of-trump
Foreign influence on our election welcoming: https://www.theatlantic.com/politics/archive/2019/06/trump-welcomes-foreign-interference-2020-campaign/591589/
Tax release avoiding: https://www.post-gazette.com/news/politics-nation/2019/05/06/donald-trump-taxes-presidential-tax-law-ways-means-committee/stories/201904250114
Birther conspiracy spreading: https://mobile.twitter.com/i/moments/776795610817007616?lang=en
Ukraine ambassador targeting: https://www.cbsnews.com/news/lev-parnas-recording-trump-is-heard-saying-take-her-out-about-ukrainian-ambassador-marie-yovanovitch-2020-01-25/
Russian money taking: https://www.brookings.edu/blog/fixgov/2019/12/13/why-trumps-tax-returns-are-so-important-this-week-in-impeachment/
Kurdish ally abandoning: https://www.nbcnews.com/news/world/former-u-s-officials-criticize-trump-s-decision-abandon-kurds-n1084156
Soldier brain injury downplaying: https://www.military.com/daily-news/2020/01/26/vfw-commander-calls-trump-apologize-headaches-remark-about-injured-troops.html
Full morning “executive time” taking: https://www.vox.com/policy-and-politics/2019/2/4/18210345/trump-executive-time-axios-private-schedule-leak
Epstein befriending: https://www.msn.com/en-us/news/crime/jeffrey-epstein-had-14-phone-numbers-connected-to-trump-in-his-contacts/ar-AAE8IIi
Kim Jong Un praising: https://thehill.com/hilltv/rising/409245-trumps-comments-on-falling-in-love-with-kim-jong-un-are-shocking-and-appalling
North Korean general saluting: https://www.usatoday.com/story/news/politics/onpolitics/2018/06/14/trumps-salute-north-korean-general-video/701740002/
US intelligence denying, https://www.nytimes.com/2019/01/30/us/politics/trump-intelligence-agencies.html
Tallest building in lower Manhattan after 9/11 boasting: https://www.indy100.com/article/trump-911-anniversary-trump-tower-height-video-interview-bragging-9100271
Congress obstructing: https://www.nbcnews.com/politics/trump-impeachment-inquiry/trump-impeached-house-abuse-power-n1104196
Nuclear non-proliferation deal ending: https://abcnews.go.com/Politics/trump-calls-nuclear-deal-bashing-misinformation/story?id=68148374
Justice obstructing: https://qz.com/1670783/all-the-evidence-of-obstruction-of-justice-in-muellers-report/
Unqualified daughter and son-in-law appointing: https://www.theguardian.com/us-news/2019/jul/01/donald-trump-ivanka-g20-north-korea-nepotism
Healthcare cut targeting: https://www.washingtonpost.com/national/health-science/trump-proposes-big-cuts-to-health-programs-for-poor-elderly-and-disabled/2019/03/11/55e42a56-440c-11e9-aaf8-4512a6fe3439_story.html
Pedophile candidate supporting: https://www.npr.org/2017/12/04/568274917/removing-any-qualifications-trump-endorses-roy-moore
Trump tower Moscow denying: https://qz.com/1670783/all-the-evidence-of-obstruction-of-justice-in-muellers-report/
Mail-bomber inspiring: https://abcnews.go.com/US/mail-bomber-cesar-sayoc-obsessed-trump-fox-news/story?id=64500598
4 out of top 5 largest protests in US history causing: https://en.m.wikipedia.org/wiki/List_of_protests_in_the_United_States_by_size
Green energy stifling: https://www.newsweek.com/donald-trump-solar-wind-power-criticism-scientists-trump-dangerous-evil-1371108
Clean water regulation destroying: https://www.pbs.org/newshour/nation/trump-administration-set-to-remove-protections-against-water-pollution
Healthy school lunch ending: https://www.nytimes.com/2020/01/17/us/politics/michelle-obama-school-nutrition-trump.html
Climate change denying: https://www.bbc.com/news/world-us-canada-51213003
Congressional and judicial branch attacking, https://www.cnn.com/2018/02/27/politics/judge-curiel-trump-border-wall/index.html
Economy does better under democrats saying: https://www.forbes.com/sites/realspin/2016/11/07/trump-is-right-about-one-thing-the-economy-does-better-under-the-democrats/
Goldman Sachs appointing: https://thehill.com/homenews/administration/324027-trump-names-another-goldman-sachs-exec-to-senior-administration-role
Food stamp removing: https://www.cbsnews.com/news/14-states-sue-to-block-the-trump-administrations-food-stamp-cuts/
Emissions standards lowering: https://www.nytimes.com/interactive/2019/climate/trump-environment-rollbacks.html
Press conference avoiding: https://www.washingtonexaminer.com/news/white-house/trump-says-he-instructed-sarah-sanders-to-stop-doing-white-house-press-briefings
Emoluments clause breaking: https://www.usatoday.com/story/news/politics/2019/10/21/donald-trump-mocks-constitution-emoluments-clause-phony/4055162002/
Longest govt shutdown record holding: https://www.cnbc.com/2019/01/11/government-shutdown-breaks-record-for-longest-ever-amid-border-wall-fight.html
Saudi Arabia nuclear tech selling: https://abcnews.go.com/Politics/trump-administration-approved-nuclear-deals-saudi-arabia-khashoggi/story?id=63492793
Golf cheating: https://www.golf.com/news/features/2019/04/02/how-why-president-trump-cheats-golf-playing-tiger-woods/
Time magazine cover faking: https://www.nbcnews.com/news/us-news/time-asks-donald-trump-s-golf-clubs-remove-phony-magazine-n777546
El Paso mass shooter inspiring: https://www.nytimes.com/2019/08/04/us/politics/trump-mass-shootings.html
Paying legal bills for roughing up protestors promising: https://abcnews.go.com/Politics/back-trump-comments-perceived-encouraging-violence/story?id=48415766
Killed soldier “knew what he signed up for” saying: https://www.ajc.com/news/national/sgt-david-johnson-widow-trump-said-knew-what-signed-for/fY9xBSJBda6usczKrbH5RL/
Pardon abusing: https://www.vox.com/policy-and-politics/2018/11/29/18117745/trump-manafort-pardon-dangle-abuse-power
Economy false-claiming: https://www.bbc.com/news/world-45827430
"Is as destructive an attack on the oath of office and our Constitution as I can imagine” Republican Senator comment receiving: https://www.foxnews.com/politics/romney-trump-chris-wallace-i-had-to-follow-my-conscience