It’s a promise which obviously has the potential to be bullshit. But it seems less likely than not. He did pardon numerous people that he said he would, and more specifically he has repeated this one on numerous occasions to the point that it would make him look really stupid if he didn’t do it.

I think he will do it simply to protect his ego and image. That’s what the bet would be on. And regardless, what would be the alternative? The same shit that would’ve happened anyway. It’s not like any other issue in any way shape or form will matter. But in the case of Ross, it’s literally “maybe he will do it,” or nothing will happen, which is exactly what will happen in literally every other option or path available.