WASHINGTON (AP) — As a U.S. senator from Illinois running for the White House in 2007, Barack Obama sponsored a resolution to prohibit President George W. Bush's administration from taking military action against Iran unless it was explicitly authorized by Congress. Nearly seven years later, U.S. fighter jets and unmanned drones armed with missiles have conducted under Obama's orders more than 150 airstrikes against the Islamic State group over the past five weeks in Iraq even as the White House has yet to formally ask Congress for authorization for the expanding air campaign. The White House says Bush-era congressional authorizations for the war on al-Qaida and the Iraq invasion give Obama the authority to expand the fighting in Syria and Iraq without new approval by Congress under the 1973 War Powers Act. White House spokesman Josh Earnest on Thursday cited the 2001 military authorization Congress gave Bush to attack any countries, groups or people who planned, authorized, committed or aided the Sept.