The 2026 New Hampshire primary election will feature competitive races for open seats in the U.S. Senate and U.S. House and will set the stage for shakeups in the New Hampshire legislature. In the U.S. Senate race, Rep. Chris Pappas, D-NH, leads among Democrats, while former Massachusetts Sen. Scott Brown and former New Hampshire Sen. John E. Sununu headline the Republican primary. Pappas’ run…