That is, he was against it, before he was for it, before he was against it.
"When Obama opposed the war in 2002, it was clearly in his political interest to do so; according to Dan Shomon, his campaign manager at the time, the key to Obama’s chances in the Democratic race for the Senate nomination lay in his ability to rally the Left to his side. Then, in 2004, when the war was still supported by most Americans, he associated himself with the Bush occupation strategy. In 2005, as Iraq was becoming increasingly unpopular, he temporized by joining those saying we had to reduce but not withdraw our troop presence. By 2006, with the war’s unpopularity deepening, he embraced a policy of full-scale withdrawal.
Like the rest of the story rehearsed here, what all this suggests is that Barack Obama does not represent an authentic new “brandâ€