On the latest episode of the Politically Speaking Hour on St. Louis on the Air, economist Aaron Hedlund talks about Gov. Mike Kehoe's plan to expand the state's sales and use taxes to get rid of the income tax. Later in the show, St. Louis Alderwoman Anne Schweitzer discusses her misgivings about a data center near the Armory Building in Midtown. And former Sen. Scott Sifton provides his impressions of how the U.S. Supreme Court handled a landmark case involving how Roundup is labeled.