George W. Bush and Barack Obama were two of the best campaigners in modern history.

Geraldine Ferraro and Sarah Palin challenged the notion of what makes a strong VP.

Ross Perot and Ralph Nader challenged the two-party system and ran as independents.

Barry Goldwater and Ronald Reagan defined the modern conservative movement and the GOP.

Gary Hart and Jesse Jackson were giant personalities with big ideas on a new world order.

Michael Dukakis and Mitt Romney ran into trouble when they were defined by the opposition.

Howard Dean and Pat Buchanan used fiery rhetoric to push America in a different direction.

Shirley Chisholm and John McCain were unafraid to speak their minds on the campaign trail.