NASHVILLE, Tenn. (AP) - Former U.S. Ambassador to Japan Bill Hagerty has officially filed to run for Tennessee's open U.S. Senate seat.

The 59-year-old Republican launched his campaign Monday. The news comes nearly two months after President Donald Trump announced in a tweet that Hagerty would join the state's most competitive 2020 contest with the position being vacated by outgoing Republican Sen. Lamar Alexander.

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In his campaign launch video, Hagerty says he's running to "fight the radical socialist agenda" and to support Trump's judicial nominations.

Hagerty has served in a number of executive positions ranging from chief financial officer, to chairman and chief executive officer. He also founded his own private equity and investment firm.

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Trauma surgeon Manny Sethi has also filed to run as a Republican for the seat.

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