AUSTIN — The U.S. Supreme Court agreed Friday to decide whether Texas' congressional and House maps discriminate against people of color, reviewing a lower-court ruling that took issue with a pair of congressional districts and several state House districts.

The maps have muddled through the court system for three election cycles amid challenges that several of the districts were drawn in a way that diluted voting power for Latino and African American voters. The state argues the districts -- which are being used again in this year's legislative and congressional elections -- are sound.

Republicans had appealed two lower court rulings, including the decision of a three-judge panel in San Antonio which invalidated the boundaries on a pair of congressional districts and nine House districts.

Now Playing:

The U.S. Supreme Court has agreed to hear a case that could change how political elections are held. The question is whether a long-used practice of redrawing districts is constitutional. So how does gerrymandering work? And why might the justices pu

Media: Fox5

The high court in September blocked the lower court rulings, granting the state's request not to require new political maps for the 2018 election, pleasing Republicans who have defended the maps.

The districts in question are Congressional Districts 27 and 35 and nine of Texas House seats in Dallas, Nueces, Bell and Tarrant counties. Republican Blake Farenthold currently holds the District 27 seat but it vacating it after this term. Democrat Lloyd Doggett now represents District 35.

Challenges to the maps drawn by the Republican-controlled Texas Legislature contend lawmakers intentionally weakened minority voting power by cramming minorities into a single district or by splitting them up across too many.

"They didn't just cheat to get an edge in a silly game, they silenced the voices minorities at the ballot box," said Texas Democratic Party Chair Gilberto Hinojosa, who said the maps are an example of Republicans "stacking the deck" against people of color.

Texas' has been using temporary court-ordered maps that were drawn for the 2012 elections and approved by the Legislature in 2013. Those same maps will be used in the March 6 primary election.

"Texans deserve for their votes to count," said Rep. Rafael Anchia, chairman of the Mexican American Legislative Caucus. "We are hopeful that the court will provide justice to voters and agree that discrimination will not be tolerated in our elections."

The maps are redrawn every 10 years following the U.S. Census, which tallies, among other things, population grown and decline.

Andrea Zelinski covers politics and the courts for the Houston Chronicle. Follow her on Twitter and Facebook. Send her tips at andrea.zelinski@chron.com