Security experts are sounding off about President Biden’s handling of classified materials, suggesting that the documents could have been more susceptible to leaks than those found in former President Donald Trump’s Mar-a-Lago estate last year.

Under scrutiny from Republicans, Attorney General Merrick Garland appointed a special counsel Thursday to investigate the classified materials, which Biden claims were “inadvertently misplaced.”

The Justice Department escalated it to a special counsel investigation from a mere review after a second stash of classified documents was found inside the garage of Biden’s Wilmington, Delaware, home. The first documents were found inside the Washington, D.C., offices of the Penn Biden Center think tank. Garland tapped Robert Hur, a former U.S. attorney, to handle the investigation.