Hillary Clinton has been ill with pneumonia, her doctor revealed in a Sunday evening statement that shook up the presidential race.

Dr Lisa R. Bardack released a statement via the campaign revealing the diagnosis on Sunday evening, hours after the Democratic presidential nominee was seen stumbling on video after exiting a 9/11 memorial event early.

Bardack said Clinton had an examination at her home in Chappaqua after the incident, which was a result of dehydration and overheating. She said the candidate is “re-hydrated and recovering nicely.”

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