Truman is famous for putting a plaque on his desk that said, "The Buck Stops Here".
Obama threw that out. In the last 6 months he has blamed everyone but himself for the mess we are in, including...
All & any Republicans
Japan's nuclear emergency
The Euro crisis
Riots in London
Occupy Wall Street
Gulf oil spill
Fires in Texas
The folks who hold to their guns and Bibles
As you can see, the only ones not to blame are Obama and his liberal cronies.
Not exactly in the mold of Harry Truman.