So just assume no evidence will be found, and don't even start an investigation unless you can already prove someone is guilty?
If there's solid evidence that Kushner gave classified info to MBS, then he better have an affirmative defense or he's going to jail. In this case, if Trump wants to pull Kushner's nuts out of the fire, yes, he can say he authorized it, even if he didn't actually know anything about it. If that's what an investigation comes up with, then Trump takes ownership of it -- something that won't happen without an investigation. Someone needs to take ownership and explain why it happened.