When Cedar Rapids Mayor Ron Corbett kicks off his Republican campaign for governor on June 20, tax reform will be a major part of his “new game plan for Iowa.”

Iowa has no shortage of Republican politicians seeking to lower taxes for those with high incomes or replace a progressive income tax structure with a flatter tax. State House and Senate leaders have promised to push for income tax cuts next year, and in her first speech as governor last month, Kim Reynolds identified “reforming Iowa’s tax structure” as her “first priority.”

But Corbett frames the case for tax reform differently from the usual GOP rhetoric about spurring investment or putting money back in people’s pockets. In a wide-ranging interview last week, the mayor repeatedly called for addressing inequities in the tax code, which now favor the wealthiest Iowans over middle-class taxpayers. He also warned it would be “a big mistake” for Reynolds to lead an “exclusively Republican” push for tax changes next year.