St. Paul's two mayoral candidates today butted heads over taxes, affordable housing and stadium subsidies. Senator Randy Kelly and City Council member Jay Benanav -- both DFLers -- appeared on MPR's Midday program with Gary Eichten. One caller wanted the candidate's opinions on two contentious city issues. One, was about a specific plan for an express bus connecting St. Paul to Minneapolis, and the other, what should be done about the Gopher State Ethanol plant. Jay Benanav thought both projects were flawed: