President Barack Obama and congressional leaders are scrambling to find a way ahead on a debt deal after House Speaker John Boehner threw negotiations into crisis by walking outless than two weeks before the deadline to avoid a potentially catastrophic default.

A visibly frustrated Obama summoned Boehner, R-Ohio, to the White House for a Saturday morning meeting with the three other leaders — Sens. Harry Reid, D-Nev., and Mitch McConnell, R-Ky., and Rep. Nancy Pelosi, D-Calif.