But the three-judge panel with the U.S. District Court for the Middle District of Pennsylvania ruled against those lawmakers and declined to block the new maps from being implemented before the state's May primary.

"The Plaintiffs' frustration with the process by which the Pennsylvania Supreme Court implemented its own redistricting map is plain," the judges wrote in their opinion.

"But frustration, even frustration emanating from arduous time constraints placed on the legislative process, does not accord the Plaintiffs a right to relief."