I appreciate the visceral wish to no longer have Trump sullying the presidential office. However, The Presidency, the Senate and The House of Representatives (Congress) are co-equal branches of government. The Presidency has all the prestige, but given the choice, I would rather have the Senate and House, because that's where all the real work gets done. The President's power is to sign executive orders, something that tends to be frowned on as undemocratic (or at least it was under Obama).
But I would also add that the balance of power over the Supreme Court
is the 4th, and possibly most important, power, because of the ridiculous system of lifetime appointments. Mitch McConnell's raison d'être has been to fill any vacant seat with republican lackeys, and he has been very successful in doing this. On this issue alone, Trump - with 3 Supreme Court picks in 4 years - has been the most successful president in a generation.
This issue is crucial. Without the Senate in Dem hands, if Biden is fortunate enough to be able to nominate a Supreme Court pick, the gloves will be off. And here, the odious Lindsay Graham also comes into play, because he will presumably retain his role as Chair of the Judiciary Committee in a Republican majority senate. LG and Biden used to be best friends, in a group with John McCain. I don't know whether that friendship has survived this presidential race. LG is a complete lick-spital, whose true colours came our after John McCain died - I believe JM was his moral compass. LG may toady up to Biden. Or he may take a cold revenge for the way the Dems went after Brett Kavanaugh. Lindsay Graham was practically crying and frothing in the Senate hearings during Kavanaugh's committee process and the Christine Blasey-Ford accusations. Then he was widely ridiculed as a bare faced liar and hypocrite, including by Biden, over the Amy Comey Barratt nomination. Graham had always boasted about how he had always been kind to previous democratic picks, and voted for them without question. In a Senate where any Biden pick would absolutely need the votes of some Republicans, I reckon anyone Biden put forward would be hauled over the coals.
In addition, the notion that the Democrats would fill the Supreme Court with additional judges, to equal the tally and effectively neutralise the 2 stolen Supreme Court seats, is now toast. No republican senate will agree to this.
Truly, Trump is beyond the pale, but his power comes from McConnell's support and from the likes of Lindsay Graham, Jeff Flake and Susan Collins too, two faced hypocrites, bleating about being worried about Trump's excesses, but who ultimately always sided with Trump. I would rather have seen these lot lose their seats (well Flake left a while ago, but the other 3 have unfortunately won again), the Dems to take both houses, and Trump remaining in power. The Dems with this power would have another proper crack at impeachment 2, as well as proper power to go after the tax returns and all the other traitorous shit, if they wanted to. Just knowing they could do this would neutralise Trump. And in the meantime, they would have the power to actually pass some decent legislation, improve the Affordable Care Act, get a decent financial package for those effected by Covid, and reverse all the rest of Trump's shit policies.
I disagree that Trump won't continue in politics. Without the Presidency, he is nothing. His business failures are writ large. His brand is poison. Everyone now sees that the emperor has no clothes. Well, everyone apart from his cult followers. His fragile, narcissistic ego needs their adoration. In addition, continuing in politics protects him to an extent against he plethora of legal action that may be taken against him. If he continues as an active political figure, then the Dems actively supporting his trial and jailing is very much vulnerable to the same criticism he has faced, that of seeking to jail a political opponent.