Fox News host Sean Hannity on Thursday night floated the idea of a “do-over” of the presidential election in Pennsylvania if the vote count is found to be illegal and fraudulent.

Hannity acknowledged that the scenario is “something that has never been done.”

Pennsylvania is essential to the possible victory of Republican President Donald Trump. As such, its 20 electoral votes are hotly sought by both parties and the vote counting has been subject to lawsuits from the Trump campaign.

After Hannity quoted the part of the U.S. Constitution which requires legislatures to determine each state’s election laws, he said, “The state legislature they decide election law and regulations, not local or city officials.”