[1/2] Former U.S. Vice President Mike Pence speaks at the Heritage Foundation in Washington, U.S., October 19, 2022.
Pence was issued a subpoena by special counsel Jack Smith, though the nature of the request was not immediately known, ABC News reported, citing sources.
The first probe involves Trump's handling of highly sensitive classified documents he retained at his Florida resort after leaving the White House in January 2021.
Last month, Garland named a separate special counsel, Robert Hur, to probe the improper storage of classified documents at President Biden's home and former office.
In late January, Pence said he was not aware though he takes "full responsibility" after classified documents were found at his Indiana home.