Geography is just one of many variables in a presidential race — but it’s a big one. Where voters turn out could determine whether President Donald Trump becomes the first Republican presidential candidate to win Minnesota in nearly half a century. Use the interactive sliders below to see how changes in turnout and the partisan mix in different regions could flip Minnesota. By Michael Corey, Anna Boone, Jessie Van Berkel and Torey Van OotStar Tribune • Sept. 22, 2020}Follow usWelcome,…Geography is just one of many variables in a presidential race — but it’s a big one. Where voters turn out could determine whether President Donald Trump becomes the first Republican presidential candidate to win Minnesota in nearly half a century. Use the interactive sliders below to see how changes in turnout and the partisan mix in different regions could flip Minnesota. By Michael Corey, Anna Boone, Jessie Van Berkel and Torey Van OotStar Tribune • Sept. 22, 2020}Follow usWelcome,WW…