Legal papers filed in Commonwealth Court by a lawyer for Stein's campaign contend the Nov. 8 election was "illegal" and the results inaccurate based on research suggesting there might have been irregularities with electronic voting machines, among other evidence.

"Petitioners have grave concerns about the integrity of electronic voting machines used in their districts," the suit stated.

Attorneys for President-elect Donald Trump moved on Thursday to block the vote recount effort in Pennsylvania, adding to similar complaints filed to stop proceedings in Wisconsin and Michigan.

"Despite being no more than a blip on the electoral radar, Stein has now commandeered Pennsylvania's electoral process, with an eye toward doing the same to the Electoral College," the complaint states.

"There is no evidence — or even an allegation — that any tampering with Pennsylvania's voting systems actually occurred."