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Who would fight Russia, Iran, Hezbollah and Syria alongside us?

Yet New Jersey Gov. Chris Christie is ready to rumble.

“Well, the first thing you do is you set up a no-fly zone in Syria, and you call Putin, and you say to him, ‘Listen, we’re enforcing a no-fly zone, and that means we’re enforcing it against everyone, and that includes you. So, don’t test me.’”

And if Russia violated his no-fly zone? “Then you take him down,” said Christie, meaning we shoot down Russian jets.

But what vital interest of ours has ever been so engaged in Syria as to justify a major war in the Middle East and a military clash with a Russia with a nuclear arsenal as large as our own?

In any war it is usually wise to enlarge the roster of one’s allies and reduce the roster of enemies. If ISIS is the implacable enemy and must be annihilated, we should welcome all volunteers.

As for those who decline to fight, but claim a veto over whom we may ally with, we should tell them to pound sand.

If Putin wants to enlist in the war against ISIS, sign him up.