Just 43 percent of Ohio voters approve of the job Obama is doing as president, virtually equal to his 42-percent approval rating last month. Among independents, just 35 percent approve, while 55 percent disapprove. Meanwhile, Sen. Sherrod Brown, D-Ohio, remains well-positioned for reelection, despite Obama's poor numbers. Half of voters approve of the job Brown is doing, compared to just 30 percent who disapprove. And Brown holds a 15-point lead over Republican state Treasurer Josh Mandel, 49 percent to 34 percent, up slightly from a 13-point advantage last month. The Quinnipiac Poll was conducted Oct. 17-23. It surveyed 1,668 registered voters, for a margin of error of +/- 2.4 percent. For the GOP primary, there were 542 Republicans, for a margin of error of +/- 4.2 percent.