Former Sen. Scott Brown launched his second Senate campaign in New Hampshire on Wednesday to replace Sen. Jeanne Shaheen (D-NH), who won’t be seeking reelection in 2026.

If Brown, who previously represented Massachusetts in the Senate, wins, it will be the first time someone has been elected to serve in the Senate in two different states. Two others in the 1800s were appointed to the Senate in multiple states before the ratification of the 17th Amendment, which changed the senator selection process from appointments to elections.