(CNN) - New polls released Thursday indicate three competitive Senate races remain tight in Ohio, Wisconsin and Florida, according to surveys by Quinnipiac University, CBS News, and The New York Times.
Starting with Florida, where Democratic incumbent Sen. Bill Nelson is defending his seat against Republican challenger Rep. Connie Mack, the two-term senator leads Mack, 50% to 41%, respectively.
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The new results marked an uptick for both candidates from a similar poll released Aug. 1, though Nelson saw more of an increase. At the time, 47% of voters said they would back Nelson and 40% said they would pick Mack.
While Mack, a four-term congressman, has long been the Republican favorite, he did not seal up the nomination until last week's primary in the Sunshine State.
In the new poll released Thursday, independent voters were divided, with 45% supporting Nelson and 43% favoring Mack.
Meanwhile in Ohio, Democratic incumbent Sen. Sherrod Brown faces a heated contest against state treasurer Josh Mandel. According to the new poll, the first-term senator leads his Republican challenger, 48% to 41%. The margin for independent voters was tighter, with 43% saying they would back Mandel and 43% saying the same thing about Brown.
In another poll released Thursday, however, the race appears to be closer between the two candidates. According to the Ohio Poll by the University of Cincinnati, Brown only has a one-point advantage over Mandel, 48% to 47%, a margin that falls well within the sampling error.
Over in Wisconsin, where former Gov. Tommy Thompson locked up the nomination last week in a crowded Republican primary, the former governor leads his Democratic opponent, Rep. Tammy Baldwin, according to the Quinnipiac University/CBS News/New York Times survey.
The two candidates are competing in an open contest to replace Sen. Herb Kohl, a four-term Democrat who is not running for re-election. With less than three months before the November election, Thompson leads Baldwin by a slim margin of 50% to 44%. Independent voters, meanwhile, more heavily favor Thompson, 54%-39%.
All three states represent critical battlegrounds in the presidential election. The same surveys also showed Mitt Romney and President Barack Obama tied in Wisconsin, Florida and Ohio.
Quinnipiac University, in cooperation with CBS News and The New York Times, surveyed 1,241 likely voters in Florida, 1,253 likely voters in Ohio, and 1,190 likely voters in Wisconsin. The survey was conducted by telephone between August 15 and August 21, and all three surveys had a sampling error of plus or minus 2.8 percentage points.
For the other Ohio poll, the Institute for Policy Research at the University of Cincinnati questioned by telephone 802 likely voters by telephone between August 16 and August 21. The sampling error is plus or minus 3.4 percent percentage points.
– CNN Political Editor Paul Steinhauser contributed to this report.
The Republican challengers need to hammer home the point that the ONLY way to get Obamacare repealed is to replace the Democrat Senators that rammed it down the throats of the American people. Without getting rid of Obama and these Senators, Obamacare is poised to destroy your healthcare system for good. It's raid on Medicare is only one of the disasters. There are many more in store if it is not repealed.
democrats need to hammer home that repealing the affordable care act is a dumb move. Replace it with what Vouchers?? Look at the lies put out by the romney camp where are your tax returns Mittens? Ryan took stimulas and lied about it. Only when presented with request signed by him did he remember. Tell us about keeping your money off shore mitt. Lets hear about rape and incest. Ryan didn't you agree with akins? and help him write his bill? Mitt how can you be for personhood and the repo platform and now change your mind on rape ? will you flip back once elected? Any body care to ecplaine that there was no raid on healthcare. Just another repo lie like the welfare one. Vote all repos out thye are lineing their own pockets and distroying the middle class. Forward 2012
When will America yarn for the simple truth? Only thing worng here is that folks are listening to idiots who will never acknowledge how hard President Obama has worked with no help for the God forsaken gop to bring the country back from the brink the gop left it in 2008. I will not be fooled and President Obama will be re-elected. The we'll see what the haters will do. Talk is cheap
Does anyone know who Quinnepac are? They are a bunch of students in a not so respected college running polls for grades. They are not scientific and are being used to teach the students about polling and statistics. Quinnepac has the lowest value rating of any polling institution in the US. Places like NBC and CNN use them because they are free.
This article says that Obama and Romney are "tied" in the other states. That is not true...Obama has leads in all three. In Ohio Obama leads 50% to 44%, in WI he leads 49% to 47% and in FL he leads 49% to 46%. I bet if Romney were leading the headline from CNN would be "Romney takes the lead....". CNN is so trying to make this race closer so they can keep ratings.