Ahead of the April 8 general election, St. Louis voters will go to the polls Tuesday for the primary election. There are four candidates for St. Louis mayor: Tishaura Jones, Cara Spencer, Michael Butler and Andrew Jones. Comptroller and two aldermanic races are also on the ballot. The top two finishers under the city’s approval voting system will go on to the general election. STLPR reporter Rachel Lippmann discusses.