I trust POTUS. The only way Barr would be able to cover up anything now is if POTUS allows it. That's the difference between then with GHWB and POTUS now. Bush was complicit.
One other reason I don't think this will get covered up…We The People are too awake and will not allow this to continue. If they want a war, then they will have one.
Remember, they went after Trump AND his family. He isn't going to let this slide. No dad would. This is personal.