Perhaps the only explanation is that Obama doesn't even want to say it in private in front of his own WH staff. Is he trying to strike a deal on his own without the knowledge of the State Department, DOD, and our intelligence agencies? What a dangerous fool. Moreover, in any negotiation, you don't signal concessions to your opponent at the outset. Very odd and disturbing.
Obama is a very odd and disturbing (and also disturbed IMO) man.
IMO he bitterness at being born a hybrid has affected his mind and his decisions.