As extremist Sunni militants continued their rampage through Iraq this week, the Shiite government appealed to the U.S. to launch air strikes. Some in the U.S. want to offer Iraqis support, but the grim reality is that there are only bad options. While ISIS is wreaking havoc in Iraq, in Syria it has the same goal as Western powers: to overthrow Bashar al-Assad. And although Iran has committed to shielding Baghdad, it supports the regime in Damascus. Obama is sending 300 military advisers to Iraq, but the U.S. is clearly wary of making a greater commitment.