Just in passing - Trump slanders a career diplomat in the phone call
I know that's not impeachable, but he went after a woman who joined the service in 1986, so served (well enough to be promoted to sensitive ambassadorships) under Reagan, Bush I, Clinton, Bush II, Obama and himself for 2 years:
Yovanovitch drew attention in early March when,weeks before Ukraines March 31 presidential election, she called on Kyiv to fire the country's special anti-corruption prosecutor. The speech was notable not only for its timing but also its bluntness.
President Petro Poroshenko, who has been accused of not doing enough to tackle corruption, lost his reelection bid in an April 21 runoff vote against comedian Volodymyr Zelenskiy.
Yovanovitch was also the target of an explosive claim in March by Prosecutor-General Yuriy Lutsenko, who alleged she had given him "a list of people whom we should not prosecute" during their first in-person meeting.
The claim, made in an interview by Washington-based newspaper The Hill, prompted an unusual rebuke by the State Department. "The allegations by the Ukrainian prosecutor-general are not true and are intended to tarnish the reputation of Ambassador Yovanovitch," it said.
Lutsenko's claim got further attention later when a tweet about the story was retweeted by President Donald Trump's son.
https://www.rferl.org/a/u-s-ambassador-to-ukraine-openly-criticized-by-top-ukrainian-prosecutor-departing-early/29924924.html
So, to be clear, Trump and one of his idiot spawn are siding with a supporter of Zelenskyy's predecessor over his own State Department.