The current occupant of the White House doesn't like to fight, and the leadership in Congress has never been as good at their jobs, at marshaling their own party, as the Republicans were when they were in the majority.
*rolls eyes* No, the difference is that Obama doesn't fight in public, or in the media. He simply goes after his opposition 'the Chicago way', that is using threats and thuggery to punish those who don't deign to give him what he wants.