David Levine caricature depicts Nixon and Humphrey as worms in a rotten apple.

The desire for change was strong in 1968, but this was hardly reflected in the presidential nominations of the two major parties. Ironically, both Democrats and Republicans were asked to rally behind candidates who in many ways were an endorsement of the status quo. For many voters, the choice between Nixon and Humphrey was no choice at all.

With his simple but incisive imagery, Pulitzer-Prize-winning cartoonist David Levine captured the growing malaise of the American body politic, a sense that the system was increasingly rotten to the core.