Impeach him again. It doesn’t sound all that crazy now does it? Trump knows if he loses, he may eventually be imprisoned as a result of his legal troubles. Another four and a slanted SCOTUS buys him time. Possibly enough for statute of limitations to expire. He will stop at nothing to “win” this election. Undermining the upcoming election is reason enough for impeachment.
If he's in his second term with a Republican Senate it won't matter a whit.
Democrats really screwed up the first time. They treated it like a legal case and Ukraine as provable treason. It's not a legal case, with no legal burden. You just need to establish why the man is unfit for the office.
Here's how I would have proceeded with my Impeachment Hearings:
DAY ONE: Donald Trump is a Security Risk. This would feature an impressive stable of military and intelligence leaders, including some of Trump's own appointees, detailing the President's lack of discretion, classified security leaks, refusal to read briefings, and business connections to unsavory foreign operatives. Putin and Ukraine would merely be a subset. Undeniable conclusion: he's an ignorant braggart and loose cannon in charge of America's arsenal.
DAY TWO: Donald Trump and the Emoluments Clause. Is the President and his extended family privately profiting from his Presidency? Undeniable conclusion: Yes. All over the place. In clear examples that would gall any taxpayer.
DAY THREE: Donald Trump and American Civics. Is the President dismantling America's system of checks and balances to protect his power, or simply out of spite? Americans haven't really been walked through this. Undeniable conclusion: the Founder Fathers did what they did to protect America from Donald Trump.
DAY FOUR: Donald Trump's People: From Bob Barr, to Betsy DeVos, to judicial appointments who never tried a legal case, Donald Trump has brought in people wildly unqualified for the job, and/or an agenda to undermine the agency they head up. His attrition rate is disturbing. Appointees who left are trying to warn us about him. Appointees still in the job command little respect. Undeniable conclusion: the very cornerstones of America are being run by people based on their loyalty to Trump, tested by their willingness to subvert public will and established regulation to serve the President's personal interests.
Add up one through four and you have the worst man for America, at the worst possible time.
(If I had a Day Five I'd just have someone read the man's most ludicrous tweets into the record)