Federal investigators have obtained voting data connected to the Republican-led review of Arizona’s 2020 presidential election, a high-profile effort that examined ballots in the state’s most populous county after the contest between Donald Trump and Joe Biden.

The Federal Bureau of Investigation secured the records through a federal grand jury subpoena sent to Arizona Senate President Warren Petersen, who oversees the state Senate that authorized the review.

The subpoena sought documents and data generated during the examination of ballots cast in Maricopa County, home to the majority of Arizona voters.

The review, launched in 2021 by Republican lawmakers in the Arizona Senate, involved a detailed examination of roughly two point one million ballots from the 2020 election.

Private contractors were hired to conduct the audit after Trump supporters and other political figures raised concerns about the vote count in the state.

When the audit results were released in September 2021, the findings did not change the outcome of the election and confirmed that Biden had won Arizona, a result already certified by state officials and affirmed through multiple recounts and reviews.

The audit report nonetheless highlighted what its authors described as procedural issues and irregularities, though subsequent investigations did not uncover evidence of fraud that would alter the election result.

The federal subpoena signals continued interest from investigators in the activities surrounding the audit and the handling of election data.

Authorities have not publicly detailed the specific focus of the inquiry, but the request for records indicates that investigators are examining the materials collected and produced during the review.

Arizona became a focal point in the national debate over election integrity after the narrow 2020 result in the state.

Biden won Arizona by slightly more than ten thousand votes, marking the first Democratic presidential victory there in more than two decades.

The Maricopa County review attracted nationwide attention as one of the most extensive examinations of ballots conducted after the election.

It lasted several months and involved both hand counts and technical analysis of voting equipment and data files.

Election officials in the county and state repeatedly defended the accuracy of the original vote tally, noting that multiple audits and recounts had already confirmed the outcome before the state Senate’s review began.

The transfer of audit records to federal investigators adds another chapter to the long-running scrutiny of the 2020 election in Arizona, an episode that continues to influence debates about election administration and oversight across the United States.