What If Arming Syrian Proxies Doesn’t Work?

A new poll finds that 55 percent of registered voters want soldiers in Iraq and Syria to fight ISIS while 36 percent are opposed. Support is strongest among Republicans (71 percent vs. 44 percent for Democrats, and 52 percent for Independents) and self-described Tea Party supporters (74 percent vs. 38 percent).

As with most polls, the question asked leads to answers that beget more questions. What exactly would the U.S. military do to fight ISIS in Iraq and Syria? What would it do that it is not doing already? How many troops? For how long?