Clinton leads Trump as Americans shrug off her pneumonia scare: Reuters/Ipsos poll

Clinton's confidence in the electoral map was underscored in her decision to make her first stop this week in North Carolina, the only battleground state President Barack Obama lost in 2012.

Clinton referenced her brief illness at the top of her speech in Greensboro, North Carolina, acknowledging that it was hard to take time off and that she initially tried to ignore her symptoms. As you may know, I recently had a cough that turned out to be pneumonia.

TAMARA KEITH, BYLINE: Hi, there.

KEITH: Yes, she did. She mentioned it both in her remarks at the event and then afterwards in a press availability with reporters. Her campaign had initially said that her episode was due to becoming overheated and dehydrated, but later announced that the candidate had been diagnosed with pneumonia days earlier.

Clinton said the email leak underscores efforts by the Russians to try to interfere with US elections. And she was asked whether this effort to maintain privacy was a problem for her.

"I want you to think with me for a minute about how I certainly feel lucky, when I'm under the weather, I can afford to take a few days off", she said. "I am inspired because for eight years, I have had the privilege to see what it takes to do this job and here's what I know for sure". First lady Michelle Obama made her debut on the campaign trail Friday with a trip to George Mason University in Fairfax, Virginia, where she encouraged young people to show up to the polls in November. So, what did the presidential hopeful get up to during her time off?

The race for the White House is rapidly tightening, with polls showing Republican nominee Donald Trump snapping at the heels of his Democratic opponent Hillary Clinton amid concerns about the health of both candidates and calls for more transparency about their medical records.

MCEVERS: Also, today Donald Trump went on "The Dr. Oz Show" to talk about his health. He acknowledged that he is heavy, but otherwise he says he's fine.

She said one of her strengths was never quitting. While Trump was shown to be slightly overweight, his doctor Harold Bornstein declared the Republican nominee to be "in excellent physical health". "And I'm going to keep doing everything I can to deliver my message about what's at stake in this election".

Clinton has an advantage among minorities, women, people who make more than $75,000 a year, and those with moderate political leanings.

The letter released on Wednesday by her campaign staff stated that Clinton underwent a chest scan that revealed she had "mild, non-contagious bacterial pneumonia", according to her physician, Dr. Lisa Bardack, chair of internal medicine at CareMount Medical in Mount Kisco, New York. She talked about the armor that she's sort of built up around herself.

Clinton said in the interview that she has been the most transparent presidential candidate.

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