Brooks made the comment in a recent interview with conservative talk radio host Matt Murphy on WAPI, which was flagged Monday by The Huffington Post.
Brooks told Murphy that he thought Clinton's exclusive use of a private email account as secretary of state violated "all rules of law that are designed to protect America's top-secret and classified information from falling into the hands of our geopolitical foes who then might use that information to result in the deaths of Americans."
"In my judgement, with respect to Hillary Clinton, she will be a unique president if she is elected by the public next November," he added. "Because the day she's sworn in is the day that she's subject to impeachment because she has committed high crimes and misdemeanors."
While the FBI was reportedly conducting an inquiry into the security of the private email server that housed Clinton's email account, the agency was not said to be targeting Clinton specifically. A referral to the Justice Department related to the potential compromise of classified information on the private email account similarly was said not to suggest wrongdoing on Clinton's part.