The old joke about opera is that it "isn't over until the fat lady sings." She seems to be warming up in the contest for the Democratic nomination, as no one seems to be able to catch Senator Hillary Clinton, according to Gallup
Edwards is stuck in the mud. It should be noted he raised less money in the 2nd quarter than John McCain, and the political obiturarists have been busy preparing for the demise of the Arizona Senator's campaign. My bet is Edwards is out before McCain.
Obama also appears to have topped out. Despite the enthusiasm of his supporters and the huge amounts of money he has raised, his lack of experience and substance just doesn't seem able to attract more than the roughly 25% of likely Democratic voters who have backed him since he announced his candidacy.
Of course, as American folk philosopher Yogi Berra cautioned, "It ain't over 'til it's over," but the curtain will come down soon on Hillary's challengers unless one of them finds a way to shake up the race soon.
I am not as confident as he is, but she is way out in front.