Hillary Clinton cancelled a California fundraising trip after being diagnosed with pneumonia and falling ill Sunday at a 911 ceremony Bobby Ryan Senators Jersey , renewing speculation about the Democratic presidential candidate's health barely eight weeks from Election Day.


"Secretary Clinton will not be traveling to California tomorrow or Tuesday," spokesman Nick Merrill said, hours after the 68-year-old candidate abruptly left the Ground Zero memorial in New York suffering from dehydration.


The incident, in which a wobbly Clinton appeared to lose her footing as she was helped into her vehicle, offered Republican Donald Trump a new opening to attack his White House rival with just 15 days before their first high-pressure presidential debate.


Clinton had been seeking to bounce back from a blunder Friday, when she told donors that half of Trump's supporters belonged in a "basket of deplorables" -- so Sunday's episode was certainly ill-timed.


The former secretary of state spent 90 minutes at the ceremony in lower Manhattan Kyle Turris Senators Jersey , greeting some relatives of those killed in the terror strikes 15 years ago, her campaign said in a statement. Clinton was a US senator for New York at the time of the attacks.


"During the ceremony, she felt overheated so departed to go to her daughter's apartment, and is feeling much better," the statement said.


Later, the campaign released a statement from her personal doctor Chris Wideman Senators Jersey , Lisa Bardack, who revealed that Clinton had been diagnosed with pneumonia Friday and was suffering from dehydration.


"She was put on antibiotics, and advised to rest and modify her schedule. While at this morning's event, she became overheated and dehydrated," according to Bardack.


"I have just examined her and she is now re-hydrated and recovering nicely."


- Stumble -


A video posted on Twitter showed Clinton appearing unsteady as she waited to get into a black van to leave the 911 service.


She appeared to stumble as she was helped into the vehicle, and had to be held up on either side by members of her entourage.


It was a humid day in New York Dion Phaneuf Senators Jersey , with temperatures around 82 degrees Fahrenheit (28 Celsius).


"Many of us (had) a sigh of relief when a gust of wind would come by because it was incredibly stifling," Democratic congressman Joe Crowley, who stood near Clinton for about an hour at the ceremony, told MSNBC.


Clinton walked out of her daughter Chelsea's home a few hours later, smiling and posing for pictures with a young girl before departing for her home in Chappaqua, just northeast of Manhattan.


"I'm feeling great Mike Condon Senators Jersey , it's a beautiful day in New York," Clinton said.


Her schedule modification comes in the heat of a tightening race in the home stretch.


There was no word from the campaign on whether Clinton would go ahead with plans to campaign in the Las Vegas area Wednesday, or whether she might campaign closer to home Monday and Tuesday.