And the race is on John Edwards announces today that he is running for president in 2008, and Barack Obama and Hillary Clinton are expected to decide very soon. On the Republican side -- Rudy Giuliani? Sam Brownback? Mitt Romney? Chuck Hagel? Midday looks at the possible contenders.11:06 a.m.
Chris Gilbert: Professor of political science at Gustavus Adolphus College in St. Peter, Minnesota.