Hur is expected to deliver a report with his findings at the conclusion of his investigation, which has sparked anxiety among the president’s aides.

Some have privately expressed concern that the probe will conclude with a politically damaging outcome as Biden campaigns for re-election, according to two sources familiar with the discussions.

Additional concern is swirling within the White House that Hur and, more broadly, the Justice Department are overly sensitive to Republican congressional oversight of their work, a third source said.

Multiple sources also drew comparisons to former FBI Director James Comey’s delivering a stinging rebuke of Hillary Clinton during her 2016 presidential campaign related to an investigation into her emails while she was secretary of state.

While Clinton was not guilty of wrongdoing, she was “extremely careless” in her handling of classified information, Comey said about four months before she lost the 2016 election.

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Congressional Republicans have raised questions about Hunter Biden’s proximity to the classified documents that were stored at the president’s home in Wilmington, Delaware. House Oversight Committee Chairman James Comer, R-Ky., wrote a letter to the White House in January questioning whether Hunter Biden had access to any of the classified documents in his father’s possession.

Hunter Biden listed his father’s Wilmington home as his address on his driver’s license during the time frame when classified documents were stored there. His attorney, Abbe Lowell, has said he did so because the Wilmington house “was his only permanent address at the time.”

The classified documents probe has unfolded as the president’s predecessor, former President Donald Trump, is accused of mishandling documents. Trump also faces allegations that he told a property manager at his Mar-a-Lago residence in Florida to delete security video allegedly showing how his employees moved boxes of documents before the FBI searched the property.

During his 2024 presidential campaign, Trump has sought to liken his handling of documents to Biden’s. The president’s aides have resisted the comparison, arguing that Biden promptly returned classified documents to the government when they were discovered in his office and then voluntarily allowed federal authorities to search his properties for additional materials.

Carol E. Lee, Monica Alba and Mike Memoli reported from Washington and Zoë Richards from New York.