The Senate map for 2020 isn't looking good for Republicans. Just as it didn't look good for Dems in 2018. Way more seats to defend in States that are trending blue or likely will follow the House voters.
If all projections hold true (which they should) similar to recent House Projections then Dems will win back the Senate and Trump will all but certainly face a full on impeachment.
Either way were going to put that old senile Benedict Arnold bastard in jail.