Nixon: Watergate
Clinton: Waterbed

Nixon: His biggest fear - the Cold War
Clinton: His biggest fear - a Cold Sore

Nixon: Worried about carpet bombs
Clinton: Worried about carpet burns

Nixon: His Vice President was a Greek
Clinton: His Vice President was a geek

Nixon: Couldn't stop Kissinger
Clinton: Couldn't stop kissing her

Nixon: Couldn't explain the 18 minute gap in the Watergate tape
Clinton: Couldn't explain the 36-DD bra in his brief case

Nixon: His nickname was Tricky Dick
Clinton: (No difference)