Sen. Lindsey Graham, a longtime friend and ally of Sen. John McCain, is now going a step further, Democrats say, and actually becoming the new McCain. Senior members of the majority party say the South Carolina Republican has displaced his Arizona mentor as the dealmaker on two big agenda items of the Obama administration: climate change and immigration. As McCain, on the heels of his presidential election defeat, has distanced himself from Democrats, Graham has moved in to fill the vacuum.