Story highlights Donald Trump hugs a narrow lead in the all-important state of Florida

In the two other states polled, Ohio and Pennsylvania, Clinton and Trump are in a tight race

Washington (CNN) New polls out Wednesday find tightening races between Hillary Clinton and Donald Trump in key battleground states.

NBC News/Wall Street Journal/Marist polls released Wednesday afternoon found Clinton and Trump virtually deadlocked in Iowa and Ohio.

Although the same news organizations found Clinton enjoying a 9-point lead in Pennsylvania, a Quinnipiac survey released Wednesday morning found a much closer race in the state, with the real estate mogul up 2 points, 43% to 41%, in the Keystone State.

Quinnipiac also found Trump and Clinton running neck-and-neck in Florida and Ohio as well. And a new survey of likely voters in Wisconsin by the Marquette University Law School found Clinton topping Trump by only 4 points, 45% to 41%, inside the poll's margin of error.

The polls, which were conducted around the same time the Justice Department decided to not pursue criminal charges against Clinton for her use of a private email server while leading the State Department, show the issue is likely to keep dogging her campaign.

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