Republicans appear headed for a "clean sweep" in statewide races next week, according to the latest SurveyUSA poll sponsored by KWCH, Channel 12. GOP gubernatorial candidate Sam Brownback is leading Democrat Tom Holland by 27 percentage points. Secretary of state candidate Kris Kobach leads Democrat Chris Biggs by 21 points. State treasurer candidate Ron Estes is 15 points ahead of Dennis McKinney. The only marginally close race is for attorney general, where Republican Derek Schmidt leads Steve Six by 8 points, with 4 percent undecided.