President Obama has declared his strategy is to “degrade and defeat” ISIS. Yet he’s hoping to do so by relying on a plan that is ludicrously insufficient. It’s worth noting that the criticism of his approach isn’t being led by Republicans as much as by U.S. military leaders (as this Washington Post story makes clear), by retired generals, and by former Obama defense secretaries like Leon Panetta and Robert Gates.

Secretary Panetta told CBS News that ISIS emerged as a threat because the United States pulled out of Iraq too soon and became involved in Syria too late, while Secretary Gates said this:

The reality is, they’re not going to be able to be successful against ISIS strictly from the air or strictly depending on the Iraqi forces or the Peshmerga or the Sunni tribes acting on their own. So there will be boots on the ground if there’s to be any hope of success in the strategy. And I think that by continuing to repeat that [there won’t be troops on the ground], the president in effect traps himself.

Yet the president, when he spoke at MacDill Air Force Base in Florida last week, once again declared that American troops will not undertake a combat mission in Iraq. “I want to be clear,” Mr. Obama said. “The American forces that have been deployed to Iraq do not and will not have a combat mission.”

The president doesn’t understand that to will the end you also have to will the means to the end. Mr. Obama would like the richest, best armed, and most formidable terrorist group ever–one that now controls large portions of two nations–to be defeated. Yet he can’t succeed simply by relying on air strikes and Iraqi and Kurdish forces and the Syrian opposition. (Just a month ago the president said the notion that arming Syrian rebels would have made a difference has “always been a fantasy” and mocked the opposition as being “made up of former doctors, farmers, pharmacists and so forth.”) That’s clear to just about every person who has seriously examined this matter. (I commend to you this report by the Institute for the Study of War, which lays out just how formidable our task is if we hope to defeat ISIS.) Yet Mr. Obama persists in living in a world of make-believe.

We can see what’s occurring. The president has a theological-like devotion to not using American combat missions to fight ISIS. This makes his commitment to defeat ISIS impossible to achieve. Yet rather than admit that to us or to himself, the president has invented assumptions that affirm what he wants to believe. This requires him to operate in a realm free of facts. To step through the looking glass. To live in Barack’s World.

Barack’s World is a place this president retreats to when the world becomes too complicated and unaccommodating. Where the wish is father to the thought. Where he can disassociate from reality. Where, when reality collides with ideology, reality loses.

While the president increasingly finds refuge in Barack’s World, the rest of us have to deal with the shattered pieces that are being left in his wake. Barack Obama is a careless man, to paraphrase a passage from F. Scott Fitzgerald’s The Great Gatsby. He has smashed up things and retreats back into his own world, letting other people clean up the mess he has made. And what a mess it is.

Peter Wehner is a senior fellow at the Ethics and Public Policy Center.