Some of the Democratic legislators fleeing Texas will appear on Sunday evening with Illinois Gov. JB Pritzker at a press conference.

Texas Democrats left the state Sunday in an attempt to prevent the state House from holding a vote Monday on new congressional maps that Republicans hope will net them several additional U.S.

Effective immediately, House Bill 3657 makes changes to Tier 2 Chicago Police and Firefighter pension benefits.

The walkout, which Texas Democrats called an “extraordinary and necessary step,” came a day after a House panel advanced a congressional map that would add five new Republican districts next year.

In an extraordinary move brokered with Illinois Gov. JB Pritzker, dozens of Texas House Democrats aim to deny a quorum as the GOP is set to draw new maps.