An important point to note. Ret. Gen. Michael Flynn just resigned amidst a counter-intelligence investigation into, among other things, his communications with the Russian Ambassador to the United States. But only three or four hours before Flynn resigned, the Chairman of the House Intelligence Committee (House Permanent Select Committee on Intelligence), Devin Nunes, said there was no problem and it was just the President's enemies ("the swamp" in his words) making trouble. "It just seems like there's a lot of nothing here," Nunes told Bloomberg's Steven Dennis.
This is only a particularly embarrassing illustration of a larger problem. The Republican Congress has no interest in any oversight of the Trump administration. None. Sure, opposing parties usually scrutinize administrations more aggressively. But it's rare to have this level of complete refusal. Again, only three or four hours before Flynn resigned in disgrace, Nunes put forward an aggressive defense of Flynn and said nothing was wrong at all.