Strong source just told me something I suspected. Hillary's debate "bathroom break" wasn't that, but flare up of problems from brain injury. — John Cardillo (@johncardillo) January 4, 2016

Speculation is swirling that front-running Democratic presidential candidate Hillary Clinton still suffers from the effects of a 2012 concussion and blood clot that sidelined her while she was secretary of state, Breitbart News reports.Retired New York Police Department officer and Blaze radio host John Cardillo tweeted Monday his suspicions about Clinton's long bathroom break during the last Democratic candidates' debate.He then elaborated to Breitbart:"I got this from both a [federal agent] . . . and I also got it from a New York [NYPD] guy who worked security at a Hillary event in New York City," Cardillo tells the conservative news outlet."These are two people that aren't just personal friends," he tells the website."I worked with one and then post law-enforcement worked with another on some related things . . . Both of them told me the same thing, that after her speeches, whether she did a talk or a policy speech, she had to sit behind — she would come off the podium backstage — and have to sit and rest before making it back to the car because she was so fatigued, dizzy and disoriented."According to Cardillo, one of the sources claimed Clinton at one time was "very pale, kind of disoriented. He said she looked like she was about to faint. She was very pale, almost sweaty."Cardillo tells Breitbart one of the incidents detailed by his sources occurred while she was secretary of state and another one was about a year ago."A number of New York Democrats, very prominent, well-known, wealthy New York Democrats, told me last year that Hillary had very significant health issues and that they were surprised that she was running in view of her health problems and her lack of stamina," Republican strategist and former Donald Trump adviser Roger Stone tells Breitbart."I don't think she has the physical stamina to be president."Trump made the identical case Wednesday And journalist Edward Klein has argued Clinton's health issues are significant."To this day, Hillary still suffers from many of the troubling symptoms that I wrote about in ['Unlikeable: The Problem With Hillary']: blinding headaches, exhaustion, insomnia, and a tremor in her hands," Klein noted last month. He adds:"There have been several incidents in which she has nearly collapsed. For example, after her 11-hour testimony before the Trey Gowdy Benghazi committee, Hillary swooned as she walked to a waiting car. She had to be supported in the arms of her aides and helped into the back seat."Clinton spokesman Nick Merrill responded to a list of questions from Breitbart News about Clinton's health saying they were "all addressed in her health statement," referring to a July 2015 letter from Dr. Lisa Bardack that cleared the former secretary of state as "fit to serve" as president.