A survey of 800 likely voters conducted by Democratic pollster GSG provides the current standing of candidates in the 2026 Kansas Senate contest. Results from Sept 13 to 16 show Democrat Adam Hamilton leading incumbent Republican Senator Roger Marshall 47% to 43% in a three-way race, with candidate David Graham at 5%. Hamilton leads Marshall 49% to 47% in a head-to-head matchup, although the result falls within the margin of error.
The survey also found Democrats leading other statewide races, putting Cindy Holscher ahead of Ty Masterson for governor 49% to 46% and Chris Mann ahead of incumbent Kris Kobach for attorney general 47% to 46%. In a memo distributed by his campaign, Hamilton noted that five independent race raters have shifted the Senate contest in his direction and two other pollsters show him leading Marshall by 2 points over the last two weeks.