11/01/12 WeAskAmerica Obama 50% - Romney 46%
11/01/12 Rasmussen Reports Obama 49% - Romney 49%
11/01/12 CNN/Opinion Research Obama 50% - Romney 47%
10/31/12 Reuters/Ipsos Obama 47% - Romney 45%
10/31/12 Wenzel Strategies (R) Romney 49% - Obama 46%
10/30/12 Reuters/Ipsos Obama 48% - Romney 45%
10/28/12 CBS/NYT/Quinnipiac Obama 50% - Romney 45%
source
http://www.electionprojection.com/2012elections/ohio_presidential_election.php