FILE- In this Oct. 14, 2016, file photo, a technician works to prepare voting machines to be used in the presidential election, in Philadelphia. Republican lawmakers aren't committing to the money sought by Democratic Gov. Tom Wolf to back up his demand that Pennsylvania's counties replace their voting machines by 2020's presidential elections. Republicans who control Pennsylvania's Legislature say a roughly $34 billion budget counterproposal they are finalizing this week doesn't include the $15 million Wolf requested. (AP Photo/Matt Rourke, File)

FILE- In this Oct. 14, 2016, file photo, a technician works to prepare voting machines to be used in the presidential election, in Philadelphia. Republican lawmakers aren't committing to the money sought by Democratic Gov. Tom Wolf to back up his demand that Pennsylvania's counties replace their voting machines by 2020's presidential elections. Republicans who control Pennsylvania's Legislature say a roughly $34 billion budget counterproposal they are finalizing this week doesn't include the $15 million Wolf requested. (AP Photo/Matt Rourke, File)

HARRISBURG, Pa. (AP) — Republican lawmakers are refusing to commit to the millions of dollars sought by Democratic Gov. Tom Wolf to back up his demand that Pennsylvania’s counties buttress election security by replacing their voting machines before 2020′s presidential elections.

Republicans who control Pennsylvania’s Legislature say that a roughly $34 billion budget counterproposal they are finalizing does not include the $15 million Wolf requested, and that they want Wolf to back off his stated intention to decertify voting machines in use last year.

Republicans never agreed to require counties to replace voting machines, and helping finance the purchases is Wolf’s problem, not theirs, said Senate Majority Leader Jake Corman, R-Centre.

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“This was a crisis that the governor created, and he needs to resolve it,” Corman said in an interview. “I feel bad for the counties, because he put a huge unfunded mandate on the counties, but that’s his responsibility.”

Wolf last year began pressing counties to buy machines with a paper-based backup, following warnings by federal authorities that Russian hackers had targeted Pennsylvania and at least 20 other states during 2016′s election.

Wolf’s administration has warned lawmakers that Pennsylvania could otherwise be left as the only state — and certainly the only presidential battleground state — without voter-verifiable paper systems that allow a voter to double-check how their vote was recorded.

Wolf’s office said in a statement Wednesday that the integrity of Pennsylvania’s elections “is everyone’s responsibility” and that it would continue pushing for lawmakers to support aid to counties.

“If they elect not to support protecting Pennsylvania’s votes, Governor Wolf will assess the best path forward for the commonwealth,” Wolf’s office said.

Pennsylvania is one of about a dozen states where some or all voters, until recently, have used machines that store votes electronically without printed ballots or another paper-based backup.

The so-called direct-recording electronic machines in wide use in Pennsylvania make it almost impossible to know whether they’ve accurately recorded individual votes or if anyone tampered with the count.

But Republican senators have complained that Pennsylvania is rushing to buy machines at considerable taxpayer expense when there are logistical hurdles and no legitimate example of an election irregularity in the state.

“This is sort of the governor buying into the whole national narrative that Trump stole the election,” Corman said. “There’s zero proof of that.”

Wolf’s administration, however, contends that the Trump administration supports its position.

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Since 2016, a wide range of election integrity advocates and computer scientists, as well as former Homeland Security Secretary Kirstjen Nielsen, have urged states to switch to machines that produce an auditable paper trail.

The total replacement cost could exceed $100 million in Pennsylvania. Wolf’s plan, issued in February, is for the state to pay $15 million to counties each year for five years, for a total of $75 million.

Information provided by Wolf’s administration Wednesday showed 33 of 67 counties, including Philadelphia, have plans to start using new voting systems on or before the April 2020 primary election. Several of the state’s most populous counties were not among them.

A particular sticking point for Republicans is Wolf’s administration forcing all 17 counties that already use machines with a paper-based backup to replace them.

Wolf’s administration has maintained that those machines are aging, lack continuing support for their software and hardware and will be more expensive in the future to replace.