The Senate voted down SJRCA 92 this afternoon.  The chamber split 19-35 on the constitutional amendment.  More details from the Tribune:

The Senate defeated a bid to give Illinois the chance to have an income tax rate with a sliding scale Tuesday afternoon.

Senators voted against putting on the November ballot the question of whether Illinois should have the power to implement a graduated tax rate to replace the current 3 percent rate for all citizens regardless of income.

Republicans unleashed stinging arguments against the proposal, saying it is tantamount to a tax increase.

Sen. Michael Frerichs (D-Gifford), the sponsor, dismissed arguments that his proposal represented higher taxes, saying it only gives voters the chance to allow a graduated income tax rather than be restricted only to the flat rate.

He suggested the state should have the flexibility to set different rates for people at different income levels.