I think the issue is that the FBI used it to get the FISA warrants. I think Graham was raising questions about the FISA warrants long ago. Opposition research is nothing new in politics, but using it to get FISA warrants, especially since the source of the Dossier was a British agent collecting it from Russian sources, which of course be KGB double agents giving this information to the British agent with the sole intention of causing all this turmoil.
So give Senator Graham credit for making this public and no I am not a constituent of his from South Carolina.
My issue is that he was curiously incurious about all this back during the primaries when he and several others were like the cat that ate the canary, could barely restrain themselves they were so cocksure and smug that Trump would never win, they knew then including Graham. He was perfectly content to hang Trump with it at the time. Pardon me for being less than impressed that he’s decided to try to run out in front of the parade now that the worm has apparently turned.