What does the Senate have to do with impeachment? Nothing. The House does its thing and the Senate does its thing. If the Senate chooses to leave him in office so be it. Doing something including doing ones duty to uphold the Constitution is reason enough. Plus the high crimes are documented and placed into the history books as he would be the 3rd President to be impeached.
Impeach. Repeat as necessary
That is just plain stupid. Does anyone really remember Clinton being impeached? It is a horrible strategy unless you have a good chance in the senate.