Byline: Jonathan Alter

Just the threat of a convention floor fight gives Hillary a weapon to use both in private and in public.

Yogi Berra, meet the Clintons. "It ain't over till it's over" neatly defines their current philosophy on the presidential race. Forget the brilliant Berra ambiguity of the word "over." How about "it"? What is the game they're now playing? The math is clear: Barack Obama will be the Democratic nominee for president unless he's caught on tape taking cash from Tony Rezko or vacationing in Hawaii with Louis Farrakhan. But the only thing dependable about the Clintons is that they never quit. Hillary has more than enough delegates to hassle Obama ...