[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2008/images/10/12/art.mccainpoll.gi.jpg caption="McCain is keeping the race close in Ohio."](CNN) - Pennsylvania may be slipping from John McCain’s grasp, but the Republican nominee is keeping the race close in the neighboring battleground state of Ohio – a state that no successful GOP presidential contender has failed to win.
CNN's new Ohio poll of polls shows Barack Obama leading McCain by three points, 49 to 46 percent. Five percent of the state’s voters were unsure about their presidential pick.
The network’s last Ohio poll of polls, released October 9, showed Obama leading McCain by four points, 50 to 46 percent. In the September 21 poll of polls, Obama led McCain by a single point, 47 to 46 percent.
Republican VP nominee Sarah Palin is slated to stop in Ohio Sunday - the third time on the past week week the GOP ticket has visited the state.
The Ohio general election "poll of polls" consists of four surveys: Ohio Newspaper Poll/University of Cincinnati (October 4-8), ARG (October 4-7), CNN/Time/ORC (October 3-6) and ABC/Washington Post (October 3-5). The poll of polls does not have a sampling error.