Hillary Clinton's press secretary said there is still a feeling of great urgency to keeping Donald Trump from the White House. | Getty Clinton camp: Polls show 'why we need to keep working so hard'

Hillary Clinton's campaign shrugged off a series of swing-state polls from Quinnipiac University that on Wednesday showed the presumptive Democratic nominee tied with or trailing Donald Trump in Florida, Ohio and Pennsylvania.

But at the same time, Clinton press secretary Brian Fallon said there is still a feeling of great urgency to keeping Trump from the White House.

"We know the battlegrounds are going to be close til the end. That's why we need to keep working so hard," Fallon tweeted. "Trump is a serious danger, folks."

Trump, meanwhile, thanked his supporters for the strong showing, tweeting a celebratory series of images featuring Fox News graphics showing the Quinnipiac results. "Thank you!" Trump tweeted, adding "#ImWithYou," an implicit shot at the Clinton campaign's initial slogan, "I'm With Her."



