Doc Drezner thinks political gravity is working on Trump. His approval rating, while stable, lags where it might be considering the buoyant economy.
I don't know. Evaluating Trump's strategy is impossible without describing his objectives. Simply assuming he wants conventional things like a House Republican majority after November assumes Trump thinks (reacts/intuits/behaves) like a conventional politician. And we can all agree there is little that is conventional about Trump.
So for example - suppose Trump's focus is his own re-election in 2020; bailing out the Republican establishment is not a priority. Would a Democrat-controlled House hurt or help in in 2020? Well, there is an excellent chance of endless investigations and impeachment. But does that hurt him?
One might think so. On the other hand, Trump has exploited and exacerbated the divisions of an already divided nation and will surely continue to do so. He may relish the idea of keeping the pot at a boil. In a national screaming match judgment and experience are devalued and the guy with the biggest megaphone often wins.
So if he has a strategy that extends beyond today's impulse what is it? Saving the House for Republicans? Or in 2020 running against a do-nothing Democratic Congress that focused on Fake News investigations rather than working to pass his agenda (whatever that is or whether he actually has one)? I don't know, obviously - it would not be my advice to let the House slide but then, I certainly would not have advised him to attack LeBron. We have a strange leader in stranger times.