DAYTON, Ohio -- See-Saw In Ohio -- Teeter-Totter Tips To Obama 21 Days Till Votes Are Counted: In an election for President of the United States in Ohio Tuesday, 10/14/08, Barack Obama captures Ohio's 20 electoral votes, according to this latest WHIO-TV/SurveyUSA latest poll.

Interactive tracking graphs, a WHIO-TV/SurveyUSA exclusive, trace a teeter-totter that tipped in John McCain's favor when WHIO-TV/SurveyUSA first polled Ohio mid-September, achieved equilibrium at the end of September, and now tips to Obama mid-October. The numbers: Obama 50%, McCain 45%. A month ago, McCain led, on the strength of a 16-point advantage among white voters. 14 of those 16 points have disappeared, and McCain now leads among whites by 2, effectively even with Obama.

There is important movement in Columbus, where Obama now leads, among wealthier Ohio voters, where Obama has erased McCain's advantage, among voters focused on the economy, where Obama has doubled his advantage, and among the less-well educated, where McCain now needs help. Among regular church goers, a group McCain must carry decisively, his 19-point advantage is now 7. Among Moderates, McCain had trailed by 9, now by 23. Among voters older than Obama but younger than McCain, another tipping point. Look at the interactive tracking graph, here.

Filtering: 725 Ohio adults were interviewed by WHIO-TV/SurveyUSA on 10/12/08 and 10/13/08. Of them, 671 RV were registered to vote. Of them, 575 were determined by SurveyUSA to have already voted, or to be likely to vote on or before election day. Of the 12% of respondents who tell WHIO-TV/SurveyUSA they have already voted, Obama leads by 18. Of the 88% of respondents who tell SurveyUSA they are certain to vote before the deadline, Obama leads by 4. Ohio has 20 Electoral College votes. George W. Bush carried Ohio by 2 points in 2004 and by 4 points in 2000.

Asked of 575 likely & actual voters. Margin of Sampling Error for this question = ± 4.2%

If the election for President were today, would you vote for ... (choices rotated) Republican John McCain? Democrat Barack Obama? Or one of the other candidates?

45% McCain (R)

50% Obama (D)

4% Other

2% Undecided