Carnegie Duo Brokering Secret US-Iran Deal?

Here is what David Ignatius wrote in this week's Washington Post op-ed:

A compelling framework for future talks has been prepared by analysts from the Carnegie Endowment for International Peace. The authors are George Perkovich, a leading U.S. scholar on proliferation issues, and Ariel Levite, a former deputy director of the Israel Atomic Energy Commission. In preparing the plan, the Carnegie team has had quiet discussions with U.S. and Iranian experts.

George Perkovich is vice president for studies and director of the Nuclear Policy Program at CEIP.
Ariel Levite is a non-resident senior associate in the Nuclear Policy Program at CEIP.

CEIP is considered the #3 best think tank in the world, only behind Brookings (#1) and Chatham House (#2).

Here is a recent Iran-related New York Times op-ed the duo wrote along with Mark Hibbs of CEIP.