Dems were always afraid that Lindsey Graham was such a dangerous gangster pit bull that they had to stop him from becoming the new Al Capone. Self defense.
People here on FR hated Graham, but the thing is that he’s simply very erratic (sometimes good, sometimes awful). He was actually one of the first to support Trump’s challenge and even gave something like $50,000 to the effort to find the truth.
Later he decided that Trump wasn’t going to be on the winning side and dropped his support, but that obviously wasn’t enough to protect him...the left never forgets.