FIRST ON FOX: Former Republican Sen. Scott Brown is building a campaign war chest as he prepares for a likely grueling Senate primary battle in New Hampshire against former Sen. John E. Sununu, in a crucial 2026 race where the GOP aims to flip a longtime Democrat-held seat.Brown, the first major Republican to jump into the race to succeed retiring longtime Democratic Sen. Jeanne Shaheen, reported on Tuesday that he hauled in over $1.2 million in fundraising during his first full quarter as a candidate, according to figures shared first with Fox News Digital.Shaheen's open seat is one of the GO...

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