Hello Nordberg,
Why? Impeachment is a Congressional power. The Senate has to hold a trial if a person is impeached. But determining if he committed serious crimes is all the House has to do. They do not have the power to poll the Senators.
The problem with Congress is it is too partisan. The deals are mostly struck before the voting. As we saw, the 'trial' was a sham. The jurors voted to not even look at the evidence. It wasn't a trial at all. It was prejudiced.
The overall effect was the reverse of justice. Instead of the accused being found guilty by a preponderance of the evidence, the evidence was not even considered. The votes were in before the trial ever began. The accused then used to publicity to enhance his power. It had the opposite effect of what was intended by the Constitution which describes an actual trial, not a mock trial.
For that reason, impeachment in the age of heavily partisan politics and shameless bought politicians, should not be engaged in unless the votes for conviction are already indicated prior to the impeachment. Otherwise, it has the precise opposite effect from what is intended by those who would bring impeachment.
That's because the Senate gets to decide how they interpret the Constitution, and if they are only going to honor the letter of the document but not the intent then there is no point in initiating that useless backfiring process.
Republicans made an absolute mockery of the Constitution - twice. That is enough.
Fool me once, shame on you. Fool me twice, shame on me. Let us not engage in a third unless there is some bite behind the bark.