“When you imagine the Koch brothers, it's hard not to think of the 1983 film 'Trading Places,' which featured as its villains a pair of brothers, commodity brokers named Randolph and Mortimer Duke.”

American political consultant, author, and commentator

David Brock is an American political consultant, author, and commentator. He is best known as the founder of Media Matters for America, the media watchdog group he established to track and challenge conservative coverage. Brock has worked as a liberal political operative and writer, and his public role has often centered on media criticism and partisan politics. Time described him as “one of the most influential operatives in the Democratic Party.”