President Donald Trump and his allies are charging ahead with plans to try to redraw the congressional map in red states beyond Texas, pressuring GOP lawmakers to act and setting up an all-out push for political advantage that will be difficult for Democrats to match ahead of the midterms.

President Trump on Saturday reupped his support for Texas Lt. Gov. Dan Patrick (R), just hours after the state legislature advanced new congressional maps that could give the GOP up to five more seats in the House during next year’s midterms.

Texas Senate Democrats plan to filibuster the House-passed redistricting map during floor debate on Friday in a last-ditch effort to delay the final passage of the plan to create five new winnable seats for the GOP.

Texas state Rep. Gene Wu joined a private strategy call on Thursday with Democratic leaders from other GOP-led states that might also redraw their maps.

Texas Republicans pass redistricting map creating 5 new GOP-leaning congressional seats despite Democratic objections about minority voting power dilution.

State party vice chair Jennifer Bukowsky said she expects a special session when district lines are decided by national Republicans.

If approved by voters, the California redistricting could nullify five new U.S. House seats Republicans are expected to gain from a new redistricting map in Texas.

Democrats and voting rights advocates have denounced the redistricting effort, which is designed to give the GOP five more seats in the U.S. House.