I don't mean "traditional American Judeo-Christian morals," whatever those are. I mean an authoritarian mindset. Trump is definitionally good because he's "strong" and he's their leader. Similarly, police are definitionally good because they enforce the law. Anything they do (unless it's against their own, or against a group more worthy than they) is therefore inherently justified.

They excuse Trump's immorality because they don't see it as immorality. They might talk about it in those terms, but that's just because they know that things like having sex with a porn star while married is generally considered wrong. It's not actually used as part of the evaluation of how good or bad a person is.

Don't kill the messenger.

For them, deep state Marxism and expensive gas is a moral failing as well.

If you think taxes are theft, then that makes politicians morally bankrupt.

Would you pick a cop with a history of sexual assault, or one that robs you?

It does. A major (perhaps the sole) aspect of this morality is that certain people are good and certain people are bad and the rules exist to benefit the former and to be used against the latter.