The top 18 percent of Illinois taxpayers cover more than 60 percent of the state’s income taxes, and the state’s millionaires pay 15 percent of Illinois’ income taxes.

A new report by Americans for Tax Reform shows that Democratic governors have enacted more than $58 billion in tax increases since 2011. Republican governors, on the other hand, have collectively signed more than $36 billion in tax cuts. Maryland Gov. Martin O’Malley, one of the nation’s top five most tax-happy governors, has signed 29 tax increases...

A progressive income tax would hit Illinois’ businesses community hard. That’s because S corporations and most partnerships “pass-through” their income to the individual owners of those businesses, meaning their profits are taxed at the state’s personal income tax rate. That’s on top of the 1.5 percent replacement tax these businesses pay. State Sen. Don Harmon...