Already consistently loathed by a solid third of GOP voters, Graham’s recent leftward bent – including his co-authoring of a controversial “Cap & Tax” proposal supported by President Barack Obama and liberal Sen. John Kerry (D-Mass.) – has him locked in a “terminal free fall,” according one prominent Republican consultant.

“A chunk of the GOP has always detested him, but in the last month a damn has broken,” said the consultant, who was granted anonymity to discuss the impact of two recent polls that were conducted in South Carolina (one allegedly by Graham’s own advisors). “More Republicans now oppose Sen. Graham than support him. Independents are also deserting him in huge numbers.”

Even more troubling for Graham is there doesn’t seem to be a way out of the box.