House Speaker John Boehner, R-Ohio, on Capitol Hill on Thursday. Boehner says Congress stands ready to work with the president on the threat from Islamic State militants. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

President Obama delivers a prime-time address from the Cross Hall of the White House on Wednesday. He pledged to lead a broad coalition against the Islamic State insurgents and vowed to target the terrorist group with airstrikes "wherever they exist." Saul Loeb/DPA/Landov hide caption

itoggle caption Saul Loeb/DPA/Landov

President Obama addresses the nation from Cross Hall in the White House on Wednesday. Opening a new military front in the Middle East, Obama authorized U.S. airstrikes inside Syria for the first time, along with expanded strikes in Iraq as part of a broad mission to root out violent Islamic State militants. Saul Loeb/AP hide caption

itoggle caption Saul Loeb/AP

Massachusetts Democratic gubernatorial candidate Martha Coakley celebrates with supporters as she claims victory in the primary election Tuesday in Boston. Elise Amendola/AP hide caption

itoggle caption Elise Amendola/AP

Rhode Island Democratic gubernatorial nominee Gina Raimondo waves as she takes the stage to address supporters during a primary election night watch party Tuesday in Pawtucket. Steven Senne/AP hide caption

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