Recently, after Clinton's debate bounce, she has overtaken or increased her lead in various swing states, such as Florida, Nevada and North Carolina.
However, it seems like Trump continues to lead in Ohio, even though Clinton has a 6-point lead in mid-August (during the convention bounce).
Below is the winning chances from June till now from The New York Times:
Source: http://www.nytimes.com/interactive/2016/upshot/ohio-election-forecast.html
Is there any particular reason why Trump has a higher chance of winning Ohio though Clinton consistently lead the state (though not by a wide margin) before overtaken by Trump?
Fyi, Ohio have voted for the winner of every election since 1944 except for 1960.