Barack Obama, to hear his advisers tell it, has finally found The One he has been looking for: John McCain. “We have been looking literally for years for someone we can cut deals with, and finally someone has stepped up,” a White House official said. West Wing aides say they now talk with McCain roughly every other day. McCain, to hear fellow Republicans tell it, has finally found The Two he has needed to make such conversations worth the bother: Sen. Chuck Schumer, a Democrat who can actually get things done in the Senate, and Denis McDonough, a White House...