WASHINGTON (AP) – Opposing sides continue to summon expert witnesses as a trial continues in a federal court in Washington on Texas political redistricting.

The three-judge panel is considering whether a district map drawn by the Texas Legislature violates the U.S. Voting Rights Act. The state of Texas and the U.S. Justice Department are each expected to call witnesses Wednesday with expertise in map-drawing and the Voting Rights Act.

Testimony will continue after a Tuesday decision by the panel to speed up the trial after the U.S. Supreme Court threw out interim district maps drawn by a federal court in San Antonio.

U.S. District Judge Rosemary Collyer says the parties arguing at this trial will be needed soon in San Antonio and will then want to focus on that proceeding.

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