John Langdon (politician)

John Langdon (June 26, 1741 – September 18, 1819) was a politician from Portsmouth, New Hampshire, and one of the first two United States senators from that state. Langdon was an early supporter of the Revolutionary War and served in the Continental Congress. After being in Congress for 12 years, including serving as the first president pro tempore of the Senate, Langdon became governor of New Hampshire.

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