Back then, Graham was known for working with Democrats on issues like comprehensive immigration reform and climate change. He voted for both of President Obama's Supreme Court picks, and has been a proponent of closing Guantánamo Bay.
He also received the lowest rating of all Republican senators from the anti-tax Club for Growth – whose president, Chris Chocola, suggested at a Monitor breakfast in September that they may support a primary challenge against Graham when he goes up for reelection in 2014.
Which may help explain Graham's recent morphing into the Obama administration's antagonist in chief. If anything, Graham seems to be taking a page out of the playbook of Utah Sen. Orrin Hatch, who was initially a top target for tea party groups in 2012, but wound up winning reelection easily after a full-court press to win back support from the right.