An new Scripps/Ohio University poll has three results:
Kerry 50%, Bush 44%
Kerry 50%, Bush 45%
Kerry 47%, Bush 48%
The Votemaster at Electoral-Vote.com explains:
The first poll came from calling households at random and asking if the respondent was 18 or over and a resident of the United States. This filter resulted in telephone interviews with 1022 people. Among this group Kerry has a lead substantially outside the poll's 3% margin of error. After asking about who the respondent planned to vote for, the interviewer asked: "Are you registered to vote at your current residence?" It turns out 15% were not. Once they were removed from the data, we get line 2, the registered voters, where Kerry is still ahead outside the margin of error. Next question was: "Are you certain or almost certain to vote?" Counting only the people who said yes, we get line 3 in the table, what are often called "likely voters." In short, in the adult resident population at large, Kerry is way ahead, but among likely voters it is a statistical tie.
So if we get out the vote, we win.