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Democratic presidential nominee Hillary Clinton was forced to leave a 9/11 memorial ceremony early because of a medical complication and fainted into her van.

Clinton spokesman Nick Merrill said, “During the ceremony, she felt overheated, so [she] departed to go to her daughter’s apartment and is feeling much better.” Clinton’s doctor, Lisa Bardack, also revealed that the candidate was diagnosed with pneumonia on Friday:

Secretary Clinton has been experiencing a cough related to allergies. On Friday, during follow up evaluation of her prolonged cough, she was diagnosed with pneumonia. She was put on antibiotics, and advised to rest and modify her schedule. While at this morning’s event, she became overheated and dehydrated. I have just examined her and she is now re-hydrated and recovering nicely.

RELATED: A man on a sidewalk filmed a faint Hillary Clinton struggling to enter a van during a 9/11 memorial ceremony

Now the campaign is trying to address the criticism that they should have disclosed Clinton’s medical condition on Friday.

CNN analyst David Axelrod questioned the campaign’s decision in a tweet on Monday:

Jennifer Palmieri, communications director for the Clinton campaign, responded to him, admitting that they could have acted differently:

RELATED: Megyn Kelly can’t help but chuckle at how Karl Rove uses his whiteboard to describe Hillary Clinton’s health

Palmieri also criticized Republican presidential frontrunner Donald Trump:

(H/T Mediaite)

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