The Missouri chapter of the National Education Association says the TV and radio spots began running Tuesday and will continue for a week.
Gov. Nixon pressed his objections to what he called a “risky, untested scheme” that would reduce the state’s income tax rate.
The legislation given preliminary approval by the Republican-led Senate could mark Missouri’s most significant overhaul of its tax policies in a couple of decades.
St. Louis County Republican Eric Schmitt would cut the state’s corporate income tax in half over five years, starting in the 2012 tax year.