Cohen column: The bygone baggage of Joe Biden

The genius of Barack Obama lay in the fact that Americans looked at him and could believe in almost anything. The left of the Democratic Party saw the revolutionary incarnation of hope, the promise of sweeping social change, and, in a black president, the overturning of America’s original sin. The center saw a measured product of Harvard Law School, a prudent reformer, a man of mixed identity and the middle ground.