But more important than Mr. Obama’s implicit repudiation of his own positions as a candidate (and the implicit vindication of Mr. Bush’s position, to say nothing of John McCain’s) is his decision to maintain a sizable U.S. military presence in Iraq — in the range of 35,000 to 50,000 troops — past the August 2010 “withdrawal” date. That “transitional force” is roughly the size of the U.S. military presence in South Korea through the Cold War. And its mission, involving training of Iraqi forces, U.S. force protection and “targeted counterterrorism missions,” largely describes what the U.S. is already doing in Iraq…

Mr. Obama delivered a sober speech, offering a policy worthy of the Commander in Chief he now is.