Several 2026 Senate contests, particularly in Iowa, Nebraska, Ohio, and Texas, show projected margins of 1 percentage point or less in recent polling aggregates and forecasts. These races feature candidate matchups in states with shifting voter patterns, including Democratic challengers gaining ground in traditionally Republican-leaning areas and competitive open-seat or special-election dynamics. Heavy outside spending, including over $200 million in Texas and substantial sums in Michigan, has amplified visibility, while polling trends indicate narrowing gaps in places like Kansas and Alaska. With Election Day three weeks away, final voter turnout, late advertising, and any shifts in the national environment could determine which races finish within 1%.