Several voter-rights groups have filed a federal lawsuit seeking to ensure that Pennsylvania voters have access to emergency paper ballots if electronic machines break down.
The groups filed suit Thursday in Philadelphia against Pennsylvania Secretary of State Pedro Cortes.
They want a judge to ensure that paper ballots are available on Election Day if more than half the voting machines break down at a polling site.
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The coalition claims that, when voting machines broke down in past elections, voters were told to wait in line or to come back later to vote. They don't want that to happen again.
The plaintiffs include the NAACP, the Public Interest Law Center of Philadelphia and Voter Action, a voting rights organization.