Ohio is always and will always be crucial. The Cuyahoga area is crucial for the Democrats. Republicans have to do well near Hamilton County and the Cincinnati area.
^ This! ^
Barack Obama became the first Democrat to carry Hamilton County in 2008 since Lyndon Johnson from 1964.
Obama carried Hamilton County, in both 2008 and 2012, above his Ohio margins.
I disagree with those thinking demographics will have the state of Ohio trend Republican. No Republican can carry Ohio if they're not carrying Hamilton County.
And the talk of demographics isn't the entire picture. After all, Obama carried Iowa in both his elections in part because he carried the state's white voters. They were more than 90 percent of the size of the state's vote in both 2008 and 2012. And Iowa tilts a couple percentage points more Democratic than national margins.
This means people's backgrounds, from particular states, says more than what is general considered.