President Barack Obama has a beer with patrons at the Pump Haus Pub and Grill in Waterloo, Iowa, Aug. 14, 2012.

President Barack Obama has a beer with patrons at the Pump Haus Pub and Grill in Waterloo, Iowa, Aug. 14, 2012.

Aug. 14, 2012 "The President waves from his campaign bus to people lining the motorcade route in Iowa."

Aug. 14, 2012
"The President waves from his campaign bus to people lining the motorcade route in Iowa."

Aug. 14, 2012 "How about a White House beer? The President was greeting patrons at Coffee Connection in Knoxville, Iowa, when this customer asked him about the White House beer. The President said he thought he might have some on his campaign bus and asked an aide to check. A few minutes later, the President delivered a bottle and the customer reacted in celebration."

Aug. 14, 2012
"How about a White House beer? The President was greeting patrons at Coffee Connection in Knoxville, Iowa, when this customer asked him about the White House beer. The President said he thought he might have some on his campaign bus and asked an aide to check. A few minutes later, the President delivered a bottle and the customer reacted in celebration."

President Barack Obama browses crafts and antiques at Grasshoppers store in LeClaire, Iowa, Aug. 16, 2011, during a three-day bus tour in the Midwest.

President Barack Obama browses crafts and antiques at Grasshoppers store in LeClaire, Iowa, Aug. 16, 2011, during a three-day bus tour in the Midwest.

Aug. 16, 2011 "I wasn’t going to include this photo but everyone loved the dog with the stuffed animal in his mouth prancing through the scene as the President talked with people at Grasshoppers store in LeClaire, Iowa, during the bus tour." (Official White House Photo by Pete Souza) This official White House photograph is being made available only for publication by news organizations and/or for personal use printing by the subject(s) of the photograph. The photograph may not be manipulated in any way and may not be used in commercial or political materials, advertisements, emails, products, promotions that in any way suggests approval or endorsement of the President, the First Family, or the White House.

Aug. 16, 2011
"I wasn't going to include this photo but everyone loved the dog with the stuffed animal in his mouth prancing through the scene as the President talked with people at Grasshoppers store in LeClaire, Iowa, during the bus tour." 
(Official White House Photo by Pete Souza)

This official White House photograph is being made available only for publication by news organizations and/or for personal use printing by the subject(s) of the photograph. The photograph may not be manipulated in any way and may not be used in commercial or political materials, advertisements, emails, products, promotions that in any way suggests approval or endorsement of the President, the First Family, or the White House.

President Barack Obama talks with people at Grasshoppers store in LeClaire, Iowa, Aug. 16, 2011, during a three-day bus tour in the Midwest.

President Barack Obama talks with people at Grasshoppers store in LeClaire, Iowa, Aug. 16, 2011, during a three-day bus tour in the Midwest.

President Barack Obama has breakfast with small business owners at Rausch’s Cafe in Guttenberg, Iowa, during a three-day bus tour in the Midwest, Aug.16, 2011.

President Barack Obama has breakfast with small business owners at Rausch’s Cafe in Guttenberg, Iowa, during a three-day bus tour in the Midwest, Aug.16, 2011.

President Barack Obama stops for lunch at Ross’ Restaurant in Bettendorf, Iowa, June 28, 2011.

President Barack Obama stops for lunch at Ross' Restaurant in Bettendorf, Iowa, June 28, 2011.

First Lady Michelle Obama receives applause following her commencement address to the 2011 graduating class at the University of Northern Iowa in Cedar Falls, Iowa, May 7, 2011.

First Lady Michelle Obama receives applause following her commencement address to the 2011 graduating class at the University of Northern Iowa in Cedar Falls, Iowa, May 7, 2011.

President Barack Obama enters the backyard of Jeff and Sandy Clubb in Des Moines, Iowa for a discussion on the economy with neighborhood families, Sept. 29, 2010.

President Barack Obama enters the backyard of Jeff and Sandy Clubb in Des Moines, Iowa for a discussion on the economy with neighborhood families, Sept. 29, 2010.