[W]hat the Switzerland negotiations ultimately lead to may help determine who the next U.S. president will be, as much as they will define the rules of the game in the Middle East.
The Iranian regime remains capable of funding its power mechanisms and suppressing opposition, while the United States ... suffers from limited political space.
The summits are not endpoints. They are the mechanism by which two countries, which can neither resolve their differences nor afford to rupture them, manage the interval between crises.