As Pennsylvania Republicans have taken steps toward an unprecedented review of the 2020 presidential election and 2021 primary, election and data security experts say their methods — and the clear partisan motivation behind them — are concerning.

A little-used Senate committee controlled by Republicans voted this week to issue a subpoena ordering Pennsylvania’s Department of State to deliver a long list of voter data and other records.

It includes a mix of publicly available and private information: specifically, all registered Pennsylvania voters’ names, dates of birth, and addresses, as well as the last four digits of their social security numbers, driver’s license numbers, and dates of their last voting activity.

They also want all communication records between the Pennsylvania DOS and county officials between May 2020 and 2021, all the directions, policies, and guidance the state had in place related to elections and voting between August 2020 and June 2021, and all election worker training materials used between August 2020 and May 2021.

Most of that information is already available to the public. State communication records are…

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