Indeed, some of Bush’s most important allies within the GOP foreign policy establishment are closely associated with his brother, whose name is almost synonymous with a war in Iraq that most Americans call a mistake.

Jeb Bush’s allies include former Secretary of State Condoleezza Rice, who is a board member of an education foundation Bush chairs, and with whom he is personally close. And soon after leaving office in 2009, Cheney, who cares most about national security, told Fox News that he is “a big fan of Jeb’s.” Bush has also impressed one of the GOP’s wealthiest donors, the hawkish casino magnate Sheldon Adelson.

Conservative foreign policy insiders say that what’s known about Bush’s views places him in the dominant interventionist wing of his party, which is still shaped by his co-signatories on the 1997 Project for the New American Century document. He has challenged the anti-interventionist views of Sen. Rand Paul and his supporters…

“Jeb’s challenge is a little different because of his last name. But in some sense he has more running room because of that — he can offer criticisms without being accused of disloyalty,” Feaver added.