New Jersey Gov. Chris Christie greets supporters at a campaign event for Scott Brown (center left) in Salem, N.H. Elise Amendola/AP hide caption

itoggle caption Elise Amendola/AP

Ukrainian President Petro Poroshenko, joined by Speaker of the House John Boehner and Vice President Joe Biden, acknowledges lawmakers' applause after addressing a joint meeting of Congress. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

SuperPAC NextGen Climate Action aired a 60-second ad about Iowa Republican Senate candidate Joni Ernst featuring two rich guys with a briefcase full of cash. YouTube hide caption

itoggle caption YouTube

Iranian Foreign Minister Mohammad Javad Zarif speaks during a recent news conference in Rome. Zarif told NPR that the U.S. has been hesitant and contradictory in its approach to dealing with the self-declared Islamic State. Fabio Campana/EPA/Landov hide caption

itoggle caption Fabio Campana/EPA/Landov

House Speaker John Boehner has expressed cautious support for the White House plan. He and other House GOP leaders are backing a measure to authorize the arming and training of moderate Syrian rebels. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

Defense Secretary Chuck Hagel, left, and Gen. Martin Dempsey, chairman of the Joint Chiefs of Staff, defend the president's strategy before the Senate Armed Services Committee. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP