He won 82 of Ohio's 88 counties in the 2014 election, including traditional Democratic strongholds of Lorain, Jefferson and Trumbull. In fact, Josh won more counties in 2014 than he did in his 2010 election over the incumbent.
His 14-point win was the largest margin of victory for any incumbent Ohio Treasurer in a quarter of a century. This is despite his opponent spending over $3 million against him and the unions doing additional independent expenditures.
He beat his opponent in her home county, her own statehouse district that she currently represents, and even her own precinct. Barack Obama won Hamilton County in 2008 and 2012.
From e-mail of Citizens for Josh Mandel