South Carolina Republican Gov.-elect Nikki Haley challenged President Barack Obama over his landmark health care overhaul Thursday in a candid, personal exchange in front of Cabinet members and newly elected governors from across the country. In an exchange that White House aides didn't dispute, Obama rejected Haley's request to repeal the health care bill... "I said the people of South Carolina and the small businesses of South Carolina cannot afford the mandated health care law they had passed," Haley said after the meeting. "I told him that our economy is already in a tough spot, and our budget cannot sustain...