As a result of a large growth in population Texas has gained a number of Congressional and State Legislative seats.
When it came time to draw up new electoral maps the Texas Legislature, which is controlled by Republicans, not surprisingly came up with a map favoring Republican candidates.
Also not surprisingly the Legislatures' maps were challenged in a federal court in San Antonio under Section 2 of the Voting Rights Act.
Meanwhile, Texas is one of those States that fall under Section 5 of the Voting Rights Act and are required to get pre-clearance from either the Department of Justice or a special three-judge court in DC. The Texas Republicans chose to go to the three-judge court for approval, but the court has yet to act.
So, with primaries looming the San Antonio court drew up its own set of electoral maps that strengthen the Hispanic vote, and presumably help Democrats.
Texas appealed to the Supreme Court to block the court drawn map, and the Justices today heard arguments in the case.
Mike Sacks' take on the arguments is here.