True....

This is not unlike the case McConnell is also making to GOP senators. Once you let one witness testify, it opens the flood gates to many more with no clear end to the trial, he and other top Rs have said in meetings. Which is why he and the WH want to end the trial in days https://t.co/VEeoWHUvo2

— Manu Raju (@mkraju) January 29, 2020

But then....

“The House could come back in February, immediately when this trial doesn’t happen in the Senate, they could come back and impeach and subpoena [John] Bolton and many others,” he explained. “That’s one bad alternative.”

“An even worse alternative is that New York State prosecutors could indict [Rudy] Giuliani tomorrow,” he continued, listing multiple felonies that could be charged.

“Would they prefer to have a Senate trial where they control all the rules of or have it be controlled by New York Democrats or House Democrats in the summer or the fall of 2020?” he asked.

And if none of that happens, there's still Bolton's book, and all the questions about why the Senate didn't interrogate him.  The "defense" is purely one of process:  Bolton's manuscript is not "evidence" (never mind the Federal Rules of Evidence don't apply in the U.S. Senate, even in an impeachment trial), and so couldn't be considered.  But that's a very "technical" argument (and really not valid as a matter of law).  That's a process argument.  And if you're arguing the process to the jury, you've lost.

So it's save yourself in the primaries, and then face people who ask why you didn't let the trial be a real trial, instead of a kangaroo court.  And it's face all the campaign ads that are coming your way, especially when even Kevin McCarthy is telling his crowd the Dems are beating the GOP silly in fundraising.  And it's explain to people why it was better for the country to leave Donald Trump alone, a man who's approval rating has never been higher than 42% in 3 years, a man who bragged about a poll showing him only 5 points ahead of Michael Bloomberg in Florida (!).

That devil you don't know is still gonna get his due.