Only a third of Ohio voters approve of the job Mr. Bush is doing as president or the way he is handling the economy, and they seem poised to take it out on Republican candidates up and down the ballot. Republican officials at the national level said this week they had all but written off the Ohio Senate and governor’s races and were diverting resources to other states where they believed they had a better chance of winning.

“In Ohio we’ve seen nothing but our manufacturing jobs cease to exist,” said one poll respondent, David Stuck, 59, of Miami Township, Ohio, who said he voted twice for Mr. Bush. He blamed inaction at the federal level for the evaporation of jobs in Ohio and said he planned for vote for the Democratic candidate for United States Senate, Sherrod Brown, over the incumbent, Senator Mike DeWine, a Republican.

“Call it a protest,” Mr. Stuck, a Republican, said in a follow-up interview. “I haven’t seen anything done in the last six years. To be honest, I’m truly thinking about voting Democratic across the board because I’m tired of Bush.”

The statewide telephone poll was conducted Wednesday through Sunday with 1,164 adults, including 1,020 registered voters. The margin of sampling error for the entire group is plus or minus 3 percentage points, and it is the same for the registered voters.

More than half of the poll’s respondents said they believed corruption was widespread in Ohio and said, by a 3-to-1 margin, that the Republican Party had more corrupt politicians than the Democrats. Gov. Bob Taft, a Republican, pleaded no contest last year to ethics charges arising from dealings with a crooked investment manager. Representative Bob Ney, an Ohio Republican, pleaded guilty to corruption charges last week arising from his association with Jack Abramoff, the lobbyist at the center of an influence-selling scandal in Washington.

Doris Stucky, a 79-year-old retired nurse from New Philadelphia, Ohio, said she thought all politicians were corrupt. “I think they’re out to line their pocketbooks and get votes and they don’t care what they do or say to get them,” said Mrs. Stucky, a Republican, in a telephone interview after she participated in the poll.

“They came down on Bob Ney and I don’t think he’s any more guilty than the rest of them,” she said. “It’s the same in Ohio. I think politicians are all the same. I wish we could find some good honest Christian politicians but I don’t think there are any.” Mrs. Stucky said she was undecided about whom she will vote for.