Wecht and Donohue explained how the Pennsylvania Supreme Court appoints the fifth and final member to the Legislative Reapportionment Commission, the group that draws the district lines, if the leaders of the state House and Senate can't agree on a selection.

The state Supreme Court also reviews any challenges to the district lines drawn by the commission, meaning the court could potentially influence the process twice.

Donohue said if voters selected all three Democrats on Election Day, all the court would need to do is apply the law.

"And gerrymandering will come to an end," she said.