I admire Cunningham as a fighter pilot immensely. He did well at it, I never heard anyone that was around him say that he was anything less than a tiger and he tells his tales well. for his service.
Now, I also view that as separate from his duty as a Congressman.
IF this is an under the table deal, be it bribe, kickback, or whatever, his "hero status" as an Ace should have no impact on what happens to him.
If he broke the law, he broke the law. Accountability, responsibility.
He won't be the first hero to "turn a trick".
It may all be legit; remember, first reports are usually wrong.
Give it a bit of time; there's going to be an investigation. No need to libel a good man and absolutely no need to excuse a crook.