Sen. John McCain (R-Ariz.) seemed Tuesday night to back off his threat that Republicans wouldn't cooperate with Democrats the rest of this year. McCain, who's drawn heavy criticism from Senate Democrats and members of the Obama administration for his remarks, said that the GOP would partner with Democrats on issues in the "national interest." "Look, let me just clarify that," McCain said of his previous remarks during an appearance on Fox News. "If it's in the national interest and there's something that requires us to work together -- a national emergency, something that we think will help the country --...