Answer: Because he believes Trump is lying.
That doesn’t make sense. Everytime he pushes for more answers faster, he is pushing the Trump Train.
For whatever reason, he is doing the right thing here. With his pushing, it looks more and more like Comey is prevaricating.
Bingo. Trump had Graham to the WH for lunch two weeks ago, and it seemed to thaw things a bit (for now). I think Graham is pushing to find out what did happen at Trump Tower - and why.
Do I fully trust Graham? Heck no - but I agree he seems to have the right motives here. Also, since he’s going thru Grassley, who has been supportive of DJT