US President Barack Obama calls on Senate to delay imposing new sanctions on Iran, rejecting criticism by senators that Washington has not been tough on Iran. White House spokesman Jay Carney says that Obama has met top Democrats and Republicans from the Senate Armed Services, Intelligence and Foreign Relations committees and urged them to delay any decision on new Iran sanctions. As Iran and the five permanent members of the UN Security Council plus Germany are slated to hold fresh round of nuclear talks in Geneva on Wednesday, Obama tell the senators that new sanctions should not be enacted during the current negotiations. Meanwhile, a group of senators wrote to Secretary of State John Kerry, calling on the administration to make a tougher line on anti-Iran sanctions. The senators warned that easing the sanctions would not force Iran to abandon its pursuit of an alleged nuclear weapon. Obama says the proposed deal would permit a modest lifting of the economic sanctions on Iran. Show Less >>