Campaigning at the Iowa State Fair — PICTURES

President Obama visits Cookie Smith at the CinnieSmiths mini cinnamon roll stand at the Iowa State Fair on Monday in Des Moines. (AP Photo/Carolyn Kaster)

Republican vice presidential candidate Rep. Paul Ryan, R-Wis., makes an appearance at the Iowa State Fair on Monday. (AP Photo/Robert Ray)

Obama has a beer with Mike Cunningham III (left) and another worker at a fair stand. (AP Photo/Carolyn Kaster)

Ryan, accompanied by Iowa Gov. Terry Branstad (left), speaks at the fair. (AP Photo/Conrad Schmidt)

Obama is given an Iowa State Fair hat. (AP Photo/Carolyn Kaster)

Nine-month-old Cole Nelson, held by his mother, Deborah Nelson, gets a good look at Obama's face. (AP Photo/Carolyn Kaster)

Republican presidential candidate Mitt Romney eats a pork chop on a stick at the 2011 Iowa State Fair. (AP Photo/Charles Dharapak)

Then-Republican presidential candidate Tim Pawlenty flips a pork chop while working in the Iowa Pork Producers tent during a campaign stop at the 2011 Iowa State Fair. (AP Photo/Charlie Neibergall)

Romney (right) and Sen. Chuck Grassley, R-Iowa, grill pork. (AP Photo/Charles Dharapak)

Then-Republican presidential candidate Rick Perry campaigns at the 2011 Iowa State Fair. (AP Photo/Charles Dharapak)

Perry eats a veggie corn dog while walking with his wife, Anita. (AP Photo/Charles Dharapak)

Then-Republican presidential hopeful Newt Gingrich and his wife, Callista, grill pork as they campaign at the 2011 Iowa State Fair. (AP Photo/Charles Dharapak)

Then-Republican presidential candidate Rep. Michele Bachmann, R-Minn., orders a corn dog at the 2011 fair. (AP Photo/Charles Dharapak)

Bachmann samples a corn dog. (AP Photo/Charles Dharapak)

Romney greets visitors at the fair. (AP Photo/Charles Dharapak)

Romney campaigns at the 2011 Iowa State Fair. (AP Photo/Charles Dharapak)