Gallup, 2013: "Ten years have passed since the United States and its allies invaded Iraq, and it appears the majority of Americans consider this a regrettable anniversary. Fifty-three percent of Americans believe their country 'made a mistake sending troops to fight in Iraq' and 42% say it was not a mistake."

Gallup, 2014: "For the first time since the U.S. initially became involved in Afghanistan in 2001, Americans are as likely to say U.S. military involvement there was a mistake as to say it was not."

New York Times, today: "The Obama administration is preparing to carry out a campaign against the Islamic State in Iraq and Syria that may take three years to complete, requiring a sustained effort that could last until after President Obama has left office, according to senior administration officials."