Left to right: New Hampshire Republican Senate hopefuls Dennis Lamare, Kelly Ayotte, Jim Bender and Ovide Lamontagne before a candidates forum in Barnstead, N.H., on Aug. 17. Jim Cole/AP hide caption

itoggle caption Jim Cole/AP

A drilling platform is seen near the site where the Deepwater Horizon oil platform in the Gulf of Mexico. Joe Raedle/Getty Images hide caption

itoggle caption Joe Raedle/Getty Images

President Obama gives a speech July 15 at the groundbreaking for a battery plant in Holland, Mich. Susan Walsh/AP hide caption

itoggle caption Susan Walsh/AP