O'Brien, chair since 2025, quit Monday, Oct. 12, and picked Bodnar over Democratic nominee Alani Bankhead for Montana's open Senate seat, writing in an MS NOW op-ed that Bankhead lacks the resources "or will" to win (The Hill); she is the latest Montana Democrat to back Bodnar.
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O'Brien had been state party chair since 2025.
This tenure detail appears only in the captured story text. No listed source specifically documents when she took office as chair.
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The Montana Senate seat is open.
The polls and markets cited show a three-way Alme–Bodnar–Bankhead race with no incumbent named, which fits an open seat. No listed source directly states that the seat is open or why.
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O'Brien is the latest of several Montana Democrats to back Bodnar.
This leans on the Bodnar campaign's own endorsements page, a partisan single source, and the 17-legislator letter, which the Daily Montanan notes asked for something narrower than an endorsement. The story does not name the other Democrats.