By Jennifer Stultz Tri-County Tribune CherryRoad Media Pratt County Republican voters gave Terry Williamson a decisive Primary Election victory Tuesday in the race for the Pratt County Commission seat which encompasses voters who live mostly in the city limits of Pratt. On the ballot for City of Pratt residents only, a sales tax increase proposal of 1 percent was voted down. To stay on the ballot for the November 3 General Election for Pratt Cou…