The moderators and a political opponent of one of the candidates coordinating a political attack is an ethical violation of neutral moderating. Also, it violates ethical standards in general, so it violates journalistic standards as well.
First of all, that’s nonsense.
Secondly, there is no evidence of “coordination” so it’s also nonsense.
Why can’t Trump fans accept that he will attract scrutiny as the frontrunner?
If he expected a coronation, he should have run in his real party, the Democrats.