New SurveyUSA Poll: Obama and McCain in Dead Heat in Minnesota

In the SurveyUSA poll, John McCain is in a statistical tie with Barack Obama, trailing 47 to 46 percent, with 7 percent undecided. The poll was conducted over a four-day period, June 13-16. A survey by Rasmussen, conducted on a single day (June 11), found Obama with a significant 13-point lead, 52 to 39 percent. All things being equal, surveys conducted over more than one day are generally considered to be a more reliable gauge of the political temperature of the target sample.
Obama had led McCain by double-digits in 4 of the previous 7 public opinion surveys conducted since March 19th.
The 1-point deficit in the SurveyUSA poll is the closest McCain has polled against Obama in three months, when SurveyUSA had McCain with a statistically insignificant 47 to 46 percent advantage over Obama back in mid-March. Overall, Obama has led McCain in 13 of 17 matchup polls conducted since November 2007 and in 13 of 14 polls conducted since late January 2008.
