Mark Halperin is an American journalist and political analyst known for his coverage of U.S. elections and his co-authorship of influential political books. He gained prominence as a political director at ABC News and later as a senior political analyst for MSNBC. Halperin co-wrote the bestsellers Game Change and Double Down with John Heilemann, offering behind-the-scenes accounts of presidential campaigns. He also co-created and appeared on political programs such as The Circus and With All Due Respect. In 2017, Halperin's media career was significantly impacted by multiple allegations of sexual misconduct, which led to his departure from several networks and projects.