Former Secretary of State Hillary Clinton was not named in the White House's Monday announcement that it was considering revoking six former national security officials' security clearances, a 33-year special forces veteran noticed.

President Donald Trump is considering revoking the security clearances of former CIA Director John Brennan; Comey; former Director of National Intelligence James Clapper; former Director of National Security Michael Haden; former National Security Adviser Susan Rice; and former FBI Deputy Director Andrew McCabe.

Those former officials have criticized Trump, yet Clinton — the president's 2016 rival — was not included on the list.

"Frankly, I was shocked that Hillary, the chief culprit, was omitted," retired Col. James Williamson told The Daily Caller News Foundation. Williamson, who was in special operations for 30 years and has held a top-level security since 1982, is president of OSPEC, a nonpartisan organization representing retired special forces and intelligence community officials.

"There is more than ample evidence that Hillary Clinton committed, whether its gross negligence, or, as [former FBI Director James] Comey would like to say, extreme carelessness," Williamson told TheDCNF. "Just from the documented evidence, there was enough to prosecute. If there's evidence to prosecute, then there's certainly grounds to pull somebody's clearance."