Iran 's supreme leader , Ayatollah Ali Khamenei , calls for an end to protests last week at Tehran University . Obama refuses to `` get into the specifics , '' administration official says . White House 's letter requested dialogue and engagement , Iranians sources say . Sources : Ayatollah Ali Khamenei has n't replied to letter sent before sermon last week election . Ayatollah Ali Khamenei made an indirect reference to letter in sermon last week .
Obama refuses to `` get into the specifics , '' administration official says . White House 's letter requested dialogue and engagement , Iranians sources say . Sources : Ayatollah Ali Khamenei has n't replied to letter sent before sermon last week election . Ayatollah Ali Khamenei made an indirect reference to letter in sermon last week .