Republicans in Texas currently hold 25 of the state’s 38 seats, and the new map ups the total they could win to 30. All of those new 30 seats were won by Trump in November by at least 10 percentage points, leading to conservative optimism they can hold them even in what’s likely to be a tough midterm environment for the party.

The biggest proposed changes are in Houston, the Dallas-area, Austin and South Texas, where several districts currently held by Democrats are remade to be more favorable to Republican candidates,

States can draw electoral maps for partisan gain, but not if it dilutes the power of voters of color, courts have found.