This is one of those things were you have one guy who always lies and one who always tells the truth and so to get the right answer you have to say "Is the other guy gonna tell me that's right?" then you do the opposite.
So in this case, I trust Grassley to ultimately be a patriot, but he may be too comped to be on the Q inside. Graham may in fact understand that Sessions is a snake waiting to bite the deepstate with deadly venom. Or he may have jumped ship like Mueller and is trying to do his bit to not end up in prison.
I just can't tell with these two