Hillary Clinton Suffered Similar Illness After Working ‘Like a Demon’: Bill

Hillary Clinton 'doing fine,' Bill says, but health questions linger 2:41

Hillary Clinton has previously suffered "the same sort" of illness that saw her abruptly leave this weekend's Sept. 11 memorial, Bill Clinton said Monday.

The Democratic nominee appeared unsteady as she departed Sunday's event. Her campaign said she felt "overheated" and later disclosed she had been diagnosed with pneumonia two days previously.

"Rarely, but on more than one occasion of the last many, many years, the same sort of thing's happened to her where she got severely dehydrated," Bill Clinton told Charlie Rose in an interview that aired on PBS on Monday. "She’s worked like a demon, as you know, as secretary of state and as a senator and in the years since."

Video Shows Hillary Clinton Walking With Support as She Leaves 9/11 Ceremony 0:33

Hillary Clinton was now "doing fine" and " looked like a million bucks [Monday] morning," according to her husband.

Asked if she might be forced to take a longer break from campaigning, he added: "No — not a shot. I'll be lucky to hold her back another day."

He said there was "nothing more to know" about her illness and that his wife had merely become dehydrated.

"People faint at my political rallies sometimes and I’m so old I'm sure it's not due to them swooning," he told Rose. "Well over 90 percent of the people I've seen collapse at political rallies, usually it's quite hot, and it's almost always because of dehydration."

Bill Clinton added that his wife's "lifestyle and her underlying indicators, from blood pressure to the amount of exercise to everything else, means she's almost certainly in better health than her opponent."

Bill O'Reilly on Hillary Clinton health scare: 'I don't understand the secrecy' 6:32