File photo of U.S. President Obama walking with Jeff and Richard Heil on the Heil Family Farm while in Haverhill

 
File photo of U.S. President Obama walking with Jeff and Richard Heil on the Heil Family Farm while in Haverhill
U.S. President Barack Obama walks with Jeff and Richard Heil (R) on the Heil Family Wind Farm while in Haverhill, Iowa, in this August 14, 2012, file photo. REUTERS/Larry Downing/Files