President Barack Obama speaks to members of the media about the situation in Iraq, Thursday, June 19, 2014, in the Brady Press Briefing Room of the White House in Washington. In the strongest sign yet of U.S. doubts about Iraq’s stability, the Obama administration is weighing whether to press the Shiite prime minister in Baghdad to step down in a last-ditch effort to prevent disgruntled Sunnis from igniting a full-scale civil war. (AP Photo/Pablo Martinez Monsivais)