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Democrats have a competitive Senate primary race in Iowa, where the party is hoping to make gains, while a smokejumper is running in a contested House primary in Montana.
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The secretary of state is testifying publicly to Congress for the first time since the war began, as the regional conflict worsens and lawmakers' patience runs thin.
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All eyes will be on the Republican Senate runoff between the incumbent John Cornyn and Attorney General Ken Paxton. But Tuesday's runoffs in Texas will feature other key contests.
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