According to the Detroit Free Press, Republican Donald Trump has cut deeply into Democrat Hillary Clinton's post convention lead, with an exclusive new Free Press poll showing Trump has moved closer to tying Clinton in a state that hasn't backed a Republican nominee since 1988.

Clinton has led practically all of the head to head polls against Trump taken in Michigan, so it is not clear whether he can break through in the state.

But the trend suggests that he has the potential for closing the gap in Michigan, potentially putting a key Democratic state in play.

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