Here's the lede of a piece from the always invaluable Warren Strobel ...

President Bush is losing his top day-to-day adviser on Iraq, the White House confirmed Monday.

Meghan L. O'Sullivan, who has played a key behind-the-scenes role in implementing Bush's controversial Iraq policies over the past four years, will leave later this spring.

Her departure, which follows that of her deputy, could leave the White House with a vacuum of long-term experience on Iraq policy, and it comes as Bush and the Democratic-controlled Congress prepare for a showdown over withdrawing U.S. troops.

Not to be catty. But could leave the White House with a vacuum of long-term experience on Iraq policy? Think that train's already left the station, hasn't it?