A clause in the Constitution that could start impeachment immediately, (emoluments)

[onenote]

3. maybe. but you'll never get the repubs in the House to do anything.

Let's say the Democrats introduce an impeachment resolution. It gets referred to the House Judiciary Committee. And then you can kiss it goodbye. There is no requirement that there be any hearings, anything. And the Democrats can force the repubs to hold hearings, a vote, anything.

Impeachment resolutions have been introduced against every president starting with Johnson, except Ford and Carter. The only times hearings have been held on any of these resolutions is when the House was controlled by a different party than the president.

So it really wouldn't matter if McCain, Graham and Collins are "on board" -- they'll never get an opportunity to do anything unless and until the House votes to impeach. And that isn't going to happen "immediately" if ever.