FREE now and never miss the top politics stories again. SUBSCRIBE Invalid email Sign up fornow and never miss the top politics stories again. We will use your email address only for sending you newsletters. Please see our Privacy Notice for details of your data protection rights.

The Democratic nominee has faced demands from both doctors and reporters to take a neurological test to prove she is fit enough for the presidency. The disturbing new footage has sparked fresh allegations about Mrs Clinton's health. During a speech in Philadephia earlier this week, the Democrat nominee's eyes suddenly appeared to be working out of sync. Critics believe the bizarre cross-eyed moment is strong evidence of a hidden neurological issue. CLINTON AND TRUMP: MOST BIZARRE CONSPIRACY THEORIES

YOUTUBE Hillary Clinton’s health has been the centre of speculation throughout her presidential campaign

In Monday's speech, footage caught her eyes darting quickly from side to side. She then later cancelled a fundraising event the following evening, prompting more concern about the presidential candidate's brain health. Hillary Clinton’s health has quickly become the unwelcome focus of her presidential campaign. Many have questioned whether the candidate is healthy enough to serve as president. Mrs Clinton suffered a serious concussion in 2012, after which blood clots were found in her brain. Her doctor said that following the concussion, she suffered from double vision and headaches. Since then, speculation had continued to get worse as the candidate began suffering from a series of coughing fits. She was then forced to leave a 9/11 memorial service this month, before nearly collapsing as she attempted to enter her vehicle.

YOUTUBE Video showing her eyes moving out-of-sync

ABC A reporter asked Hillary Clinton if she would be willing to take neurological tests

There's no need for that Hillary Clinton, when asked about taking a brain test

Her campaign managers later confirmed that she had been diagnosed with pneumonia two days earlier. On Wednesday, a reporter questioned whether Mrs Clinton has released enough information about her health to the American people. NBC journalist Sarina Fazan asked if she will have neurological tests performed. Mrs Clinton hit back and said there was "no need" for a brain test. The reporter then pointed out that there was an elevated risk for dementia among older people. The 68-year-old politician responded: "I am very sorry I got pneumonia. "I am very glad that antibiotics took care of it and that’s behind us now. "I have met the standard that everybody running for president has met in terms of releasing information about my health. "The information is very clear and the information meets the standards every other person running for president has ever had to meet."

AP Clinton suffered from blood clots and a concussion in 2012