WASHINGTON (Reuters) - Senior U.S. lawmakers urged the Obama administration on Tuesday to take a tougher line in negotiations with Iran over its nuclear ambitions, saying Tehran should roll back its nuclear program before economic sanctions are eased.
Democratic Senators Charles Schumer, Robert Menendez and Bob Casey, as well as Republicans John McCain, Lindsey Graham and Susan Collins signed the letter to Secretary of State John Kerry, released a day before a third round of talks in Geneva between Iran and six world powers.