FBI investigators are now “99 percent sure” that Hillary Clinton’s private email server The revelation led House Homeland Security Committee Chairman Michael McCaul to describe Clinton’s handling of her email system during her tenure as secretary of state as “treason.” McCaul said on “Fox & Friends” Thursday morning. “Our adversaries have this very sensitive information... In my opinion, quite frankly, it’s treason.” was breached by foreign hackers, sources close to the investigation claim.