Former US Senator John E. Sununu won the New Hampshire Republican Senate primary on September 9, 2026, defeating Scott Brown. Sununu will face Democrat incumbent Jeanne Shaheen's replacement in a race critical to Senate control.
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Frontrunner Sununu beats Scott Brown to earn Republican nod in closely watched race in November Former senator John E Sununu triumphed on Tuesday in the New Hampshire Republican Senate primary Scott Brown, earning the GOP nod in what will likely be a must-win race if Democrats hope to seize the upper chamber. Sununu, 61, was the clear frontrunner in the GOP primary. He served one term in the Senat
The general election race to replace Jeanne Shaheen, a Democrat, could help determine control of the U.S. Senate.