Dan Osborn led a strike in 2021 against the Kellogg’s plant in Omaha. Now he is challenging Senator Deb Fischer as an independent in deep-red Nebraska.
Mr. Rosendale entered the Republican primary race less than a week ago, but Donald J. Trump’s quick endorsement of his main rival left him facing an uphill fight.
Senator Sherrod Brown is betting that the issue will aid his re-election bid in Ohio, which recently upheld abortion rights. Allies of Senator Jon Tester of Montana are also hoping it helps.
More than three dozen incumbents have announced they will not seek re-election next year. Some are running for other offices, while others intend to leave Congress altogether.