Two days after Republican leaders in the Legislature said they didn’t want lengthy debates over tax bills, with recorded roll call votes on one amendment after another, the Kansas Senate is working Sunday night doing just that.

On Friday, both the House and Senate voted to send a tax bill that was little more than an empty shell into a conference committee so that a small group of legislators from each chamber could negotiate various combinations of tax increases, put them into the shell bill, and send them to the full chambers for straight up or down votes.

Instead, the Senate is now allowing full debate on the floor about the bill, allowing individual senators to bring forth proposals in the form of amendments, to see which ones can get the 21 votes needed for passage.

But a large number of rank-and-file lawmakers from both sides of the aisle complained about that process, arguing that major tax policy deserves full debate by both chambers.

Lawmakers need to come up with roughly $400 million in new revenues to balance the budget they are proposing for next year, and even more than that if they want to build in a cushion in case revenues don’t come in as expected.

Sunday marked the 101st day of the 2015 session, making it among the longest sessions in modern history. The next fiscal year begins July 1, the point at which the state will officially run out of spending authority if lawmakers don’t pass a balanced budget.