David M Jackson

USA TODAY

A new poll has good news for Donald Trump in the swing states of Florida, Ohio and Pennsylvania.

Trump is either slightly ahead or tied with Democratic rival Hillary Clinton in those three key battlegrounds, according to a Quinnipiac University Swing State Poll released Wednesday.

"He has wiped out Hillary Clinton's lead in Florida; is on the upside of too-close to call races in Florida and Pennsylvania and is locked in a dead heat in Ohio," said Peter A. Brown, assistant director of the Quinnipiac University Poll.

The numbers, according to Quinnipiac:

One possible reason for Clinton's drop: her use of private email while secretary of State.

Said Brown: "While there is no definite link between Clinton's drop in Florida and the U.S. Justice Department decision not to prosecute her for her handling of emails, she has lost ground to Trump on questions which measure moral standards and honesty."

Trump's only real movement is in Florida, according to these polls; the Ohio and Pennsylvania numbers are relatively constant, within the margin of error.

Also worth noting: The Florida sample is 29% Democrat; 35% of Democrats made up the state electorate in the 2012 presidential election, and the Clinton campaign is predicting a strong Democratic turnout in the Sunshine State this November.

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

Meanwhile, a NBC News/Wall Street Journal/Marist poll in Pennsylvania also released Wednesday showed Clinton with a solid lead there. The poll found Clinton up nine points, 45% to 36%, over the real estate mogul.

In two other battleground states, the NBC News/Wall Street Journal/Marist survey found tighter contests. In Iowa, Clinton led 42% to 39%, while in Ohio, the two presumptive nominees were tied, 39% to 39%.

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