The weird thing with US politics post gerrymandering is that the only competitive race for house members is during primaries, and Pres. Trump has shown an amazing ability to primary members who don't vote with him.

Presumably all of this power goes away if his approvals drop among the Republican base, in which case, would expect a lot more Republican defectors.

Until then it seems the house probably won't be a useful counter balance, even though republicans only hold a tiny 2 seat majority. The senate is probably where that'll happen...