Senator Lindsey Graham, currently gritting his teeth down to nubs while trying to muster some genuine enthusiasm for Ted Cruz, said Sunday that Donald Trump’s foreign policy proposals will “lead to another 9/11.” The hawkish Republican said that Trump’s isolationist views were reminiscent of the Obama/Clinton Doctrine.

“Obama did not intervene in Iraq,” Graham said on Face the Nation. “We had Iraq in a good place. He withdrew all of our forces, against sound military advice. He didn’t intervene in Syria. His entire national security team advised President Obama to help the Free Syrian Army when Assad was on the ropes. He took a pass. That’s how ISIL came about. ISIL came about because of poor foreign policy choices by President Obama. Leading from behind is not working.”

Playing off a line in Trump’s speech last week, Graham said, “Do not buy the siren song of isolationism.”

Graham’s view of the Obama/Clinton errors is a common one among Republicans, but it’s not a rebuke of Trump’s proposals. The so-called “neocon” wing of the party has this tendency to make Trump sound like he’s Rand Paul and that’s just not in evidence. Trump has made it very clear that he will make the destruction of ISIS one of his primary goals.

But the question is, what’s after that? And that’s the question many Americans have at this point. What pops up to replace ISIS? Which dictator is going to squash a rebellion next? Why does it sometimes feel as though the U.S. is going out of its way to make trouble? How many Al Qaedas are we creating along the way?

We’ve been mucking around in the Middle East for more than forty years now, and you can’t blame hard-working Americans for wanting to know why. Trump isn’t calling for a complete withdrawal from the world stage. It’s not a crime against conservatism to start questioning some of these things. What money are we pouring into these third-world hellholes that could be better spent domestically?

All the pundits are biting their nails about Trump’s “America First” slogan, seeing as how it was used among isolationists who wanted us to stay out of World War II. But this kind of snark presupposes that because the isolationists were wrong in that instance, they’re always wrong. And if that’s the kind of mindset that currently dominates the Republican Party, then we really do need someone to go in and shake things up.