First, let us note that Obama sings sweeter than any bird- he is the 21st century William Jennings Bryan. In Oslo, he explains why he wages war, in an acceptance speech for the Nobel Peace Prize- and they stay to applaud.
This guy could sell iceboxes to Eskimos.
Equally shrewdly, his "passive" presidential style splits the opposition. He will only lead on matters in which the Executive is expected and required to lead. Anyone attacking him is also attacking the powers of the next president.
Republicans are thus split. Those who want to preserve the powers of the presidency can't attack Obama, but an apparently larger number of Republicans derive more pleasure from whining about how they are mistreated, and would happily throw out the baby with the bathwater.
It's actually a pretty good position from which to drive forward a progressive agenda- if the rest of the team could start making the plays.