[Al Ahram] President Barak Obama has welcomed President Mohamed Morsi's calls for dialogue with opposition figures. During a speech to the nation on Thursday, President Morsi invited all political forces for talks to put an end to the ongoing dispute over his 22 November constitutional declaration and the draft constitution. He said the constitution would be put to a referendum on 15 December as planned.A White House statement on Thursday said Obama had urged Egyptian opposition leaders to take part in talks with the president without setting pre-conditions.