The first post-presidential debate poll in critical Ohio shows that Mitt Romney blunted President Obama's momentum with his winning performance and is now leading the president among Ohioans who say that they are "certain" to vote.

Overall, the race is deadlocked with Obama over Romney 50 percent to 49 percent, according a new Rasmussen Reports poll taken Thursday night.

But among the stunning 92 percent of likely voters in the state who say that they are certain to go to the polls on Election Day, Romney leads 51 percent to 48 percent. And among the 83 percent who have already made up their minds how they will vote, Romney is ahead of Obama 52 percent to 48 percent.

The president, however, has a two-to-one lead among the 17 percent "who could still change their minds between now and Election Day," said Rasmussen.

On Thursday, Secrets reported that the GOP has closed the large gap Democrats held in requests for absentee ballots used for early voting, a sign that Romney is doing better in the state than some other polls have shown.

Romney is also gaining with Ohio voters when it comes to who is best to handle the economy and national security.

Rasmussen said that in September, Ohio voters trusted Romney more than the president when it comes to handling the economy by a narrow 48 percent to 46 percent margin. Now, he has a 49% to 45% lead in voter trust on the economy.

On national security, Romney edges Obama 48 percent to 47 percent. Last month, Obama had a five-point lead.

And 50 percent think the economy will improve if Romney wins and the GOP keeps the House and wins back the Senate. Not so if Democrats win. Just 34 percent think the economy will improve if Obama wins reelection and the Democrats Congress, with 40 percent believing it will get worse.