The state usually seldom sees even 60 percent.

Slightly more than half think the war is going badly and has failed to improve security in the United States.Get Breaking News Delivered to Your Inbox CBS News and CBSNews.

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One issue on which voters' opinions have shifted dramatically since 2000 is the state of the economy.In 2000, only 13 percent of voters leaving the polls said that the nation's economy was not good or poor.

In contrast, in preliminary exit poll data from the 2004 election more than half of voters give the economy a not good or poor rating.

Normally, negative perceptions of the economy are generally a bad sign for the incumbent.Supreme Court were unsuccessful.

Early Tuesday, Justice John Paul Stevens, who handles appeals from Ohio, refused a request to stay the 6th Circuit decision.Get Breaking News Delivered to Your Inbox The best estimates are that nearly 75 percent of Ohio's 8 million registered voters will show up to cast their ballots, reports CBS News Correspondent Cynthia Bowers.

The state usually seldom sees even 60 percent.That high turnout combined with bitterly partisan battles over whether all of Ohio's 800,000 new voters are really eligible to cast a ballot add up to trouble.

"We know we're going have problems and the only question is whether the margin will be close enough so those problems will affect the result," Dan Tokaji of Ohio State University said.