go-to guy on immigration, confirming nominees, and even heading to egypt at the president's request. in 2008, did you ever think you would be president obama's republican deal maker? >> no, because i thought i would be -- no, but i worked on a lot of issues with president clinton, as well as a republican president. so it's not as if i haven't done this before. >> and like before, it made mccain especially unpopular with the conservative base of his party. >> you could say there are two john mccains. the one who campaigns like a conservative and the one who legislates like a liberal. >> in 2010, conservative j.d. hayworth gave mccain his toughest senate challenge ever. vulnerable in the gop primary, mccain tacked right. he stopped talking compromise on immigration, putting principle aside and playing to the