After nearly a decade in the political wilderness, the neoconservative movement is back, using the turmoil in Iraq and Ukraine to claim that it is President Obama, not the movement’s interventionist foreign policy that dominated early George W. Bush-era Washington, that bears responsibility for the current round of global crises.

Even as they castigate Mr. Obama, the neocons may be preparing a more brazen feat: aligning themselves with Hillary Rodham Clintonand her nascent presidential campaign, in a bid to return to the driver’s seat of American foreign policy.

To be sure, the careers and reputations of the older generation of neocons — Paul D. Wolfowitz, L. Paul Bremer III, Douglas J. Feith, Richard N. Perle — are permanently buried in the sands of Iraq. And not all of them are eager to switch parties: In April, William Kristol, the editor of The Weekly Standard, said that as president Mrs. Clinton would “be a dutiful chaperone of further American decline.”

But others appear to envisage a different direction — one that might allow them to restore the neocon brand, at a time when their erstwhile home in the Republican Party is turning away from its traditional interventionist foreign policy.

It’s not as outlandish as it may sound. Consider the historian Robert Kagan, the author of a recent, roundly praised article in The New Republic that amounted to a neo-neocon manifesto. He has not only avoided the vitriolic tone that has afflicted some of his intellectual brethren but also co-founded an influential bipartisan advisory group during Mrs. Clinton’s time at the State Department...