More than 7 in 10 Americans support airstrikes against Sunni insurgents in Iraq, up from 45 percent when the threat of the Islamic State first became apparent in June. Support for action in Iraq and Syria spans Democrats and Republicans, with 9 in 10 saying the Islamic State poses a serious threat to U.S. interests. President Obama’s approval ratings continue to lag, especially on handling international affairs and immigration. Majorities see him as too cautious on international issues, and 52 percent view his presidency as mostly a failure. Read related article.