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HARRISBURG (AP) — Pennsylvania says it’s working on a comprehensive overhaul of its election apparatus, including its voter registration database.

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The announcement came Friday after Democratic Gov. Tom Wolf ordered counties that plan to replace their electronic voting systems to buy machines that leave a paper trail, a safeguard against hacking. Wolf’s administration says the move will increase the security of voting systems and make balloting easier to audit.

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Officials at the Pennsylvania Department of State say they’ve “made no determination” on whether they will eventually bar the use of the antiquated voting machines.

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Hackers scanned voter registration databases around the nation before the 2016 presidential election.