White House refuses to ` ` get into the debate , '' administration official says . Obama 's administration requested cooperation and engagement , Iranian official say . Sources : Ayatollah Ali Khamenei has n't replied to letter since before June 7 election . Khamenei made an indirect reference to letter in sermon last week .
White House refuses to `` get into the specifics , '' administration official says . Obama 's letter requested dialogue and engagement , Iranian sources say . Sources : Ayatollah Ali Khamenei has n't replied to letter sent before June 12 election . Khamenei made an indirect reference to letter in sermon last week .