John E. Sununu holds a commanding lead in New Hampshire’s Republican Senate primary due to consistent polling advantages of 35 points or more, bolstered by high name recognition from the state’s prominent political family, Trump’s endorsement, and backing from the National Republican Senatorial Committee. Recent surveys from the University of New Hampshire and Saint Anselm College show him at 54-60% support among likely Republican voters ahead of the September 8 primary, with Scott Brown trailing at around 20%. Brown has emphasized independence from Trump and criticized Sununu for skipping recent debates, yet these efforts have not narrowed the gap. Minor candidates including Dan Innis register negligible support. Scenarios that could still alter the outcome before Election Day include unusually low turnout or last-minute shifts in voter sentiment among moderates and libertarians.