John Henry Hoeven III ( HOH-vən; born March 13, 1957) is an American banker and politician serving as the senior U.S. senator from North Dakota, a seat he has held since 2011. A member of the Republican Party, Hoeven served as the 31st governor of North Dakota from 2000 to 2010. In 2010, Hoeven was elected to the U.S. Senate, succeeding Senator Byron Dorgan, who chose not to seek reelection. Hoeven became North Dakota's senior senator in 2013 after Kent Conrad retired and was succeeded by Heidi Heitkamp, who was once Hoeven's opponent for the governor's office. Before being elected governor, Hoeven was a banker who served in numerous executive roles at various banks, most notably as president of the nation's only state-owned bank, the Bank of North Dakota, from 1993 to 2000. He is on the board of directors at First Western Bank & Trust and has an estimated net worth of $45 million, making him one of the wealthiest U.S. senators. He is the dean of North Dakota's congressional delegation.