David Brock is an American political journalist, author, and commentator known for his influential role in progressive media. He began his career as a conservative journalist, famously writing 'The Real Anita Hill,' before undergoing a significant political transformation. In 2004, he founded Media Matters for America, a progressive media watchdog group dedicated to correcting conservative misinformation in the U.S. media. Through his organizations and writings, Brock has become a prominent and often controversial figure in modern American political discourse.