The idea of sending a large American military force to push Islamic State (ISIS) militants out of its de facto capital in Raqqa, Syria and parts of Iraq has been firmly rejected President Barack Obama, whose ISIS strategy was dissected immediately after the mass shooting by ISIS sympathizers in San Bernardino, California.

But it’s a hot topic on the presidential campaign trail, with prescriptions like Texas Senator and Republican hopeful Ted Cruz’s idea of “carpet bombing” the group in both countries. Critics, among them former Secretary of State Robert Gates, have publicly shunned such policy statements as simplistic and even irresponsible. GOP frontrunner Donald Trump has said he “would bomb the hell out of those oil fields,” referring to ISIS controlled parts of Iraq.

On the Democratic side, former Secretary of State Hillary Clinton has sounded more hawkish than Obama, her former boss. Her closest rival, Vermont Senator Bernie Sanders, has been dismissed as thin on foreign policy for saying Muslim nations in the region must do the dirty work.

Experts widely agree that whomever wins the White House in November will not be able to avoid the ISIS problem. Right now, there is no way to accurately predict who that person will be. What we do know is that selling an answer to ISIS while campaigning and actually having to act on it as Commander in Chief are two very different things.