What house votes to impeach?

The House of Representatives votes to impeach. The Senate tries and decides on sentence. The Impeachment can be thought of sort of like a Grand Jury decision. It allows the trial to go forward, but it's not the trial itself.

Basically both parties are so committed to defending their own that it's unlikely either will ever vote to convict one of their own party. What the Republicans seemed ready to do vs Nixon is how this stuff should work. Be skeptical, but when evidence of wrongdoing by a President comes to light, you have to put your partisanship aside and become a professional.

Unfortunately, the Dems failed to do that with Bill Clinton and Republicans failed to do it with Trump. That's the state of the country. We don't have good people in power in either party.