They knew he was a crook when they voted for him. What's he supposed to have done now that he hasn't done just as blatantly before, and been rewarded for it?

Mind, there were people who claimed to be surprised when Nixon was caught lying and Clinton turned out to be lecherous bastard.

It's a bit as if people had got indignant at Abraham Lincoln because a few years down the line from electing him they suddenly noticed he had a beard.