(CNN) - When Jennifer Granholm delivered an impassioned speech at the Democratic Convention last month, the political world lit up with questions over what was behind her highly-charged, theatrical address.
But the former Michigan governor said she was fueled by nothing other than her patriotic spirit.
Tune to CNN for Wednesday's presidential debate coverage starting at 7 p.m. ET on CNN TV, CNN.com and via CNN's apps for iPhone, iPad and Android. Web users can become video editors with a new clip-and-share feature that allows them to share favorite debate moments on Facebook and Twitter.
- Follow the Ticker on Twitter: @PoliticalTicker
"I did not have any Red Bull. I was not - didn't have any medication," she said Wednesday on CNN's "Newsroom." "I was high on democracy,"
Her comments came one day after President Barack Obama's former auto industry adviser, Steven Rattner, suggested on MSNBC that Granholm "must have had some medications or something in her system."
"I worked with her," Rattner said. "That's not the Jennifer Granholm I knew."
On the final night of the DNC, Granholm revved up the Time Warner Cable arena in Charlotte, North Carolina with a rousing and spirited defense of the bailouts of Chrysler and General Motors. The former governor had the crowd on their feet and energetically applauding as she touted Obama's role in rescuing America's auto industry.
"The entire auto industry, and the lives of over 1 million hard-working Americans, teetered on the edge of collapse; and with it, the whole manufacturing sector. We looked everywhere for help. Almost nobody had the guts to help us - not the banks, not the private investors and not Bain Capital. Then, in 2009, the cavalry arrived: Our new president, Barack Obama!" Granholm cheered.
Talking about the speech Wednesday, Granholm added she had to yell over the crowds' thunderous response in order to keep her speech short.
"It was a hoot, I'll just say that," she said.
The former governor, who's now a host on the progressive network Current TV, also weighed in on recent polls in Michigan that show Mitt Romney behind Obama, even though Romney was born in the state and his father once served as governor.
- Check out the CNN Electoral Map and Calculator and game out your own strategy for November.
Granholm, however, said the GOP nominee had no chance in her state, pointing to his opposition to the so-called auto bailouts that were started under President George W. Bush's administration and carried out under Obama. The federal loans are widely credited with saving the auto industry.
"He is going to lose Michigan because he stabbed us in the back when we were on our knees, and he continues to do it," Granholm said.
Romney penned a New York Times op-ed titled "Let Detroit Go Bankrupt" in 2008 and argued for a managed bankruptcy rather than the use of government funds.
Granholm added that she considers Michigan a "purplish" state, but predicted a win for Obama, who carried the state in 2008 with 16% of the vote.
CNN's Electoral Map rates the state as "leaning towards" the president.
- CNN’s Ashley Killough and Paul Steinhauser contributed to this report.