In its final day of the spring session, Illinois lawmakers voted to pass legislation that would legalize slots at racetracks and increase the number of casinos around the state, reports the Chicago Tribune. The sponsor, Sen. Terry Link, estimates the measure could raise as much as $400 million in license application fees and could generate between $300 million and $1 billion once the gambling operations are functioning.

Ill. Gov. Pat Quinn has attacked the bill for not banning political contributions from gambling interests. Quinn’s general counsel also said the revenue estimates were overrated, the bill lacked adequate state authority over the Chicago casino and there are ethical shortfalls.

The bill passed the Senate by a vote of 30-26, the minimum needed for approval and six votes shy of a total that would override a veto by the governor. In a vote in the House last week the bill had 69 votes, two short of the amount needed to overturn a veto by the governor.