The communists in the House define what is “high crimes and misdemeanors.”
Re: Senate convicting, see my post 1825 - “most of the GOP caucus are Uniparty RINOs” who won’t even support a border wall for US Security.
The House can define the crimes any way they want, but the Senate is the jury. They make the decision.
Even the RINOs want to get re-elected. How do they spin their vote to the 63 million Trump voters? How does the GOP remain intact when the majority party in the Senate cannot cannot stop the removal of a duly elected Rep President who has done nothing wrong, i.e., no conspiracy and no obstruction of justice? And when the IG and Durham reports reveal the attempted coup against a sitting President, there will be a reckoning.
Amash is a pariah who has left the GOP. Arlen Specter became a Dem. There will be no mass defection in the Senate. The bigger question is do the Dems have enough votes in the House to impeach? Doubtful, especially the 31 freshmen Dems who won in districts that Trump won in 2016.