Who is David McCormick, the former hedge fund CEO running for Senate?

David McCormick has long traveled in elite financial and political circles, most recently leading the world’s largest hedge fund, Bridgewater Associates. He served as a high-ranking Treasury official in President George W. Bush’s administration and previously ran other businesses in Pittsburgh.

McCormick, 56, is using his background as a West Point graduate, Army veteran, and native Pennsylvanian — though one who until very recently lived in Connecticut — as the backbone of his Republican campaign for U.S. Senate. He’s one of the GOP front-runners in his first bid for elected...