Here's what we know about early ballot problems

More than 50 million voters in the United States have already cast their ballots since early voting began in mid-September as the country looks to elect the next president and other candidates down the ballot.

However, people looking to cast their votes ahead of Election Day have been faced with several challenges. Long lines in Pennsylvania have frustrated many residents trying to cast their vote early. Other voters’ ballots have been destroyed and damaged in arson attacks, and hundreds more ballots were discovered on a roadside after falling off a processing vehicle.