Can the Turtles Catch Up with the Hares?

Former Senator John Edwards says he’s not worried that Hillary Clinton and Barack Obama are getting all the attention, but New Mexico Governor Bill Richardson's frustrated about it. So are Senators Chris Dodd and Joseph Biden, who, like Richardson, have lengthy experience. With the first primaries 10 months away, polls show five also-rans way behind the top three. How did that happen? Why don't the so-called "second tier" candidates just drop out like Tom Vilsack, Evan Bayh and Mark Warner? We speak with political scientists, strategists and speechwriters about polls, pundits, party activists and money.