Some part of me wants Trump to make this mistake, and make more big mistakes of the non-lethal variety quickly so that there is grounds to impeach him before he starts a war.
You are more optimistic than I am about the prospect of a GOP-controlled congress impeaching a GOP president.
I think they would only do so if he did something that was obvious to everyone to be a serious existential threat to the US's existence as a country.
I mean, it'd have to be something even more beyond the pale than ignoring the Constitution and transforming the US government into an authoritarian regime without the rule of law. Like, nuking China for no reason, or something.
According to Robert Reich[0], the republicans' whole plan is to use trump to ram through their unpopular agenda and then impeach him when he's no longer useful:
Him: They’ll get as much as they want – tax cuts galore, deregulation, military buildup, slash all those poverty programs, and then get to work on Social Security and Medicare – and blame him. And he’s such a fool he’ll want to take credit for everything.
Me: And then what?
Him (laughing): They like Pence.
Me: What do you mean?
Him: Pence is their guy. They all think Trump is out of his mind.
Him: So the moment Trump does something really dumb – steps over the line – violates the law in a big stupid clumsy way … and you know he will ...
Me: They impeach him?
Him: You bet. They pull the trigger.
He's been in office for one week. At this rate, he won't last more than a few months. I'm fully confident that he'll piss off the wrong group of people at some point in the next 0-6 months and land himself in court. If Bill came close from lying about cheating on his wife...then again, sort the votes chart at https://en.wikipedia.org/wiki/Impeachment_of_Bill_Clinton by party affiliation. Then again, I'm sure many more Red Team would want Pence instead, so I'm sure we'll see.