United States Army Secretary Daniel Driscoll has submitted his resignation following months of tension with Defense Secretary Pete Hegseth, according to media reports.

Asked about a report on Driscoll's resignation on Monday, the White House did not deny it.

"Secretary Driscoll has been highly effective in advancing President Trump's agenda to Make America Strong Again at the Department of the Army by providing outstanding leadership during historic military operations, restoring an emphasis on readiness and lethality, assisting with negotiations between Russia and Ukraine, and more," White House spokeswoman Anna Kelly said in a statement.

"The United States Army is more powerful than ever thanks to his work alongside the Commander-in-Chief and Secretary of War," she added.

It remained unclear whether the White House had accepted Driscoll's resignation, according to a source familiar with the matter. The Army declined to comment.

Driscoll, a former law school classmate of Vice President JD Vance, is the latest senior official to leave the Pentagon under Hegseth.

The Defense Secretary fired Army Chief of Staff Randy George in April, while the Army's commander in Europe and Africa, General Christopher Donahue, unexpectedly stepped down in June. Hegseth has removed several other generals and admirals, including the head of the Navy.

The Pentagon abruptly announced in April that Navy Secretary John Phelan was leaving the job, becoming the first head of a US military service to depart during President Donald Trump's second term.

According to sources, Driscoll had raised concerns with the Trump administration "surrounding Army transformation and readiness" as well as "Hegseth's blocking [of] those efforts specifically by firing the generals who were responsible."

One US official, speaking on condition of anonymity, said Hegseth viewed Driscoll as a threat within the bureaucracy and had long wanted to remove him. However, Driscoll's ties to Vance made it difficult for Hegseth to act. The official said the firing of General George caught Driscoll off guard and led to increased frustration with Hegseth.

Driscoll was confirmed as Army Secretary in February 2025. He pushed the Army to be more agile in acquiring cheaper weapons and was critical of large defense contractors. The Army secretary is responsible for training and equipping soldiers.

Driscoll gained prominence beyond the Pentagon when Trump tapped him to participate in talks with Moscow and Kyiv aimed at ending Russia's war in Ukraine, a rare diplomatic role for an Army secretary.

Driscoll served during the Iraq War and later ran unsuccessfully for Congress in 2020 before advising Trump's 2024 re-election campaign.