christina roma was next.he white house is also expecting rahm emanuel to leave the use to run for mayor of chicago. >> if rahm emanuel leaves, he will be the fourth of president obama's closest advisers to have left since july. question, after 20 months, is this presidential staff turnover normal? pat buchanan. >> this is not terribly unusual if you have a presidency in trouble. john, when you came into the white house, '71, john connolly came in, dave kennedy was out. nixon closed the goal window, let the dollar flow. he sent arthur burns to the federal reserve. they gunned the money supply to $23 billion deficits. that was enormously dramatic in terms of a change. this is nothing like that. rahm is going out there because there's an opening for mayor's office and secondly, because he has been hammered and had a bad time. but i don't think this is extraordinarily unusual. i don't see any signs of panic here. >> a vietnam war on his hands. >> nixon, our election was disappointing and he took that big move. jo