As I understand it; impeachment in the House is the same as when a prosecutor 'indicts' someone in front of Grand Jury which they say is pretty much always approved. In this case the House is supposed to present solid evidence of wrongdoing; either a crime or something so abhorent to congress and the people that it then moves to the Senate. Obviously that didn't happen in this case. No wrongdoing was found at all. Just things the radical dems don't like like banning transgenders in the military; a good and prudent call.
Then the person is arraigned and a trial date is set which would be like the Senate deciding on how or if this will go forward with impeachment (a trial). Then the judge, prosecutor, and of course, the defendant will decide on a trial, a plea agreement, and/or pleads guilty or not guilty. The Senate may call for a vote on whether to proceed or dismiss the charges as unfounded which of course is what is happening here.
If it moves forward then evidence is presented and the defendant, President Trump's defense team, is then free to call witnesses to disprove the House's charges which in this case would be as easy as buttering toast.
What I would really like to see is the 229 representatives who voted for impeachment without any facts, proof, or grounds; to be censured permanently. None of them are fit to hold office but since they can't be fired; they can be neutered and spayed.
I would like them all to undergo drug testing.