Iran talks in overtime as nuclear deal proves elusive

Blowing through a self-imposed deadline, negotiators from Iran, the U.S. and five allied powers labored into the night trying to hammer out an outline toward a final deal to curb Iran’s nuclear programs, but Obama administration officials said talks will carry on into Wednesday in the hope that a stalemate can be broken on “several difficult issues.”

State Department spokeswoman Marie Harf told reporters at the talks in Lausanne, Switzerland, that top diplomats from the U.S., Britain, France, China, Russia, Germany and Iran had “made enough progress” to “merit staying...