Texas Gov. Greg Abbott has promised to sign a new congressional voting map designed to help Republicans maintain their slim majority in Congress.

Republican lawmakers are pursuing the unusual mid-decade redistricting plan amid pressure from President Donald Trump to protect the GOP’s slim majority in the U.S. House.

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 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.

Democratic Rep. Lloyd Doggett, the longest-serving member of Texas' congressional delegation, announced Thursday that he will retire instead of run for re-election if new congressional district boundaries aren't rejected in court after state Republicans carved up his Austin-area home district in new maps.

After Texas and California, the legislative action in a nationwide redistricting battle is set to move to Missouri and three other Republican-led states.