Democratic Senate candidate Robin Carnahan talks to members of the media during the Governor's Ham Breakfast at the Missouri State Fair Thursday, Aug. 19, 2010 in Sedalia, Mo. (AP Photo/Charlie Riedel)
President Obama joins Missouri Secretary of State Robin Carnahan, who is running for Senate, at a campaign rally in Kansas City on July 8. Her opponent is a seven-term GOP congressman.
Missouri Secretary of State Robin Carnahan (front) speaks to supporters during an election-night party after she won the Democratic nomination for the U.S. Senate. Rep. Emanuel Cleaver II, Missouri Democrat, stands behind her. (AP Photo/Ed Zurga)
President Barack Obama and Missouri Senate hopeful Robin Carnahan take part in a campaign fundraiser, Thursday, July 8, 2010, in Kansas City, Mo. (AP Photo/Pablo Martinez Monsivais)
President Barack Obama walks into a campaign fundraiser for Missouri Senate hopeful Robin Carnahan, Thursday, July 8, 2010, in Kansas City, Mo. (AP Photo/Pablo Martinez Monsivais)
President Barack Obama takes off his suit jacket during a campaign rally for Missouri Senate hopeful Robin Carnahan, Thursday, July 8, 2010, in Kansas City, Mo. (AP Photo/Pablo Martinez Monsivais)
President Barack Obama speaks at a campaign fundraiser for Missouri Senate hopeful Robin Carnahan, Thursday, July 8, 2010, in Kansas City, Mo. (AP Photo/Pablo Martinez Monsivais)
President Barack Obama speaks at a campaign rally for Missouri Senate hopeful Robin Carnahan, Thursday, July 8, 2010, in Kansas City, Mo. (AP Photo/Pablo Martinez Monsivais)
A supporter stands up to applaud during the introduction of President Barack Obama at a campaign fundraiser for Missouri Senate hopeful Robin Carnahan, Thursday, July 8, 2010, in Kansas City, Mo. (AP Photo/Pablo Martinez Monsivais)
President Barack Obama and Missouri Senate hopeful Robin Carnahan during a campaign rally for in Kansas City, Mo., Thursday, July 8, 2010. (AP Photo/Pablo Martinez Monsivais)
President Barack Obama greets supporters at a campaign rally for Missouri Senate hopeful Robin Carnahan, far left, Thursday, July 8, 2010, in Kansas City, Mo. (AP Photo/Pablo Martinez Monsivais)
President Barack Obama waves to supporters after speaking at a campaign rally for Missouri Senate hopeful Robin Carnahan, Thursday, July 8, 2010, in Kansas City, Mo. (AP Photo/Pablo Martinez Monsivais)