U.S. Senate candidate David McCormick of Pennsylvania sought a court order to allow the Republican to make mass challenges to provisional ballots in Philadelphia in a race he appears to have won, according to court papers.

Republican David McCormick defeated three-term Democratic Sen. Bob Casey in Pennsylvania, the Associated Press projected, underscoring the battleground state’s red shift this year while expanding the GOP’s Senate majority in the next Congress.

Pennsylvania Republican Senate candidate David McCormick filed two lawsuits challenging provisional ballots in Philadelphia, signaling he is prepared to take his fight to the Supreme Court. McCormick declared victory after The Associated Press projected Thursday that he beat incumbent Sen.