President Barack Obama is greeted by former Iowa Attorney General Bonnie Campbell on the tarmac upon his arrival at Des Moines International Airport, Saturday, Sept. 1, 2012, in Des Moines, Iowa. (AP ... more 
President Barack Obama is greeted by former Iowa Attorney General Bonnie Campbell on the tarmac upon his arrival at Des Moines International Airport, Saturday, Sept. 1, 2012, in Des Moines, Iowa. (AP Photo/Pablo Martinez Monsivais) less 
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Associated Press | Photo By Pablo Martinez Monsivais
Sat, Sep 1, 2012 3:01 PM EDT