The Republican and Democratic leaders in the state Senate suspect Illinois hasn’t heard the last of switching to a progressive income tax.

The proposal would have required voters to approve a constitutional amendment on the November ballot, but it was never brought up for a vote.

Illinois is one of 8 states with a flat income tax which taxes all personal income at the same rate. A progressive tax would be similar to federal taxes, where higher incomes are charged at a higher rate.

The sponsor of the proposal, State Sen. Don Harmon (D-Oak Park), claimed it would amount to a tax cut for 94 percent of Illinois residents. Republicans claimed it would raise taxes.

Senate Minority Leader Christine Radogno (R-Lemont) says if there’s going to be tax reform, it won’t happen with the current majority held by Democrats in the legislature.

Radogno says her concern with a progressive tax is that once the amendment is approved by voters, lawmakers could then raise the tax rates from what was originally proposed.