Pennsylvania's senior U.S. senator waded into the state-level fight, sending a letter to state Majority Leader Dominic Pileggi telling him that abandoning the winner take all system in favor of awarding electoral votes proportionally would "diminish" Pennsylvania's political influence in presidential elections.
"Several political scientists have asserted that by doing away with the current winner-take-all system, Pennsylvania’s influence would diminish, ceding power to the voters of other large, politically diverse states," Casey wrote. "As a commonwealth, our state should speak with one voice when the people of Pennsylvania make a decision in a presidential election."
Pileggi and 12 cosponsors have introduced legislation to award presidential electoral votes based on a percentage of the popular vote. Democrats have accused Republicans of trying to rig the election since Democratic candidates for president have won all of the state's electoral votes in every election since 1992.
Casey warned the Republicans that their efforts could come back to bite them.
For more background on the Pennsylvania plan, read this Morning Call story from February here.