Obama administration officials would not confirm whether President Obama called for direct talks with Iran, after an Iranian lawmaker claimed Wednesday that the president floated the proposal in a secret letter to the Islamic Republic's supreme leader. The White House acknowledged the letter and reiterated that the door remains open for Iran to return to international talks over its nuclear program. "It remains available to Iran to this day," White House Press Secretary Jay Carney said, adding that the U.S. position has not changed. But he did not confirm whether the president called for direct talks. The letter also warned...