Vice presidential nominee Tim Kaine received the official Chicago welcome from Cook County Board President Toni Preckwinkle and Illinois Attorney General Lisa Madigan during a campaign stop Wednesday.
Mayor Rahm Emanuel was busy at a City Council meeting but was quick to defend Hillary Clinton as she rests, recovering from pneumonia, on the same day she released her medical records.
"She's one tough cookie," Emanuel said. "I know she'll make a speedy recovery."
Donald Trump is set to disclose his medical records on a Wednesday episode of "Dr. Oz," including what medications he takes.
The release of the candidate's medical records comes after new polls show the race tightening in battleground states like Ohio and Florida.
Kaine says Clinton released far more information than Trump.
"It seems like something 'Wizard of Oz,' it's just like surreal," Kaine said. "This is a job interview, and there's some basic information that the American people have the right to expect.
Kaine was slated to attend two Chicago fundraisers Wednesday night, including one at the home of Bill Daley, brother of former Chicago mayor Richard M. Daley.
Clinton is set to return Thursday to the campaign trail after being diagnosed with pneumonia.
"She is recovering well with antibiotics and rest," said her doctor, Lisa Bardack, in a letter released by her campaign Wednesday. "She continues to remain healthy and fit to serve as President of the United States."