There are about a half dozen Republican Senators in very competitive races in 2020. These races could swing the Senate from Republican to Democratic control.
What if Pelosi didn't forward the impeachment papers to the Republican Senate until just before or just after these close call Republican Primaries were over?
What if the Senate was forced to take up the impeachment trial in June, July or August?
What if these Republican Senators were forced to vote on Trump's impeachment in August or September?
What would these Republican Senators do if they had to support Trump just before there own close call re-election?