Under the new map, Republicans are eyeing earning 30 seats in Congress — from their current 25 — partly by moving Cuellar and Gonzalez into districts Trump won by double digits. The proposal would also remove three Democratic-held seats in Houston, San Antonio and Dallas and create new districts that are potential Republican pickup opportunities.

The proposed map would give Republicans a chance to gain five U.S. House seats, including in Houston, Dallas and along the U.S.-Mexican border.