U.S. Attorney General Pam Bondi took a tour of Alcatraz Island in San Francisco Bay Thursday morning as part of President Trump's directive to revert the popular tourist attraction to a federal penitentiary.

U.S. President Donald Trump's plan to convert Alcatraz back into a maximum-security prison could cost roughly $2 billion, Axios reported on Friday citing administration sources.

Democrats have blasted the idea, including California Congresswoman Nancy Pelosi, who called it Trump’s "stupidest initiative yet."