Keywords bought by candidates

REPUBLICANS

Rudy Giuliani: war on terror, Republican Party, social conservative, same-sex marriage.

John McCain: POW, Republican, Iraq war, New Hampshire primary.

Mitt Romney: National Review, Fox News, Islamic terrorism, radical jihad.

DEMOCRATS

Dennis Kucinich: universal healthcare, end Iraq war.

Barack Obama: Iraq war, Iowa caucus.

COMPILED BY JOANNA WEISS