Republican Sen. Susan Collins has publicly disclosed for the first time that she has a benign essential tremor, a long-standing health condition , as she campaigns for reelection in one of this year's most competitive Senate races.

The Maine senator confirmed the tremor to WCSH-TV on Wednesday, following questions about her health that arose from recent video appearances, including her campaign announcement.

Collins stated the condition causes trembling in her hands, head, and voice, and she has lived with it throughout her nearly three-decade career in the Senate.…