Just replying to this whole discussion, not exactly this post….Yes, but the alleged criminal act must have already occurred. It can't be in the future.
Remember that all crimes are alleged until proven otherwise in court. You don't need to be convicted of anything to receive a pardon. That's why Jimmy Carter's DoJ couldn't prosecute Nixon.
But supposed LBJ had anticipated that Nixon would do something slimy and pardoned him in 1968. That wouldn't have helped him for crimes he committed in 1972.
No, he doesn't have to believe crimes were committed. All he has to believe is that there's a possibility that crimes will be alleged.
The dissonance seems to be, “Isn’t the pardon power being stretched way out of what is historical or what seems right as far as interference in the judiciary, or what the founders intended?”
The problem is, now, that the average citizen cannot be expected—especially in certain venues—to honor their oaths as jurors above their political motivations. That is, for almost all of these kinds of defendants—whether Trump, Biden, Fauci, Capitol trespassers, Alex Jones, abortion protesters, etc—we can no longer expect them to get fair trials. So the pardon power has expanded without that much opposition to counter the modern reality that juries no longer check their politics at the door, when the defendant is known to them through the political process as an “enemy.”