Why do poll results differ?

by Perry Finelli, Minnesota Public Radio

The poll results in the Minnesota Public Radio - St. Paul Pioneer Press poll which showed President Bush with 46 percent and Democrat John Kerry with 44 percent are significantly different from a Minneapolis Star Tribune's poll that showed Kerry ahead in the presidential race. That poll, released yesterday, had Kerry at 50 percent, and Bush had 41 percent. Morning Edition substitute host Perry Finelli spoke with University of Michigan professor Michael Traugott, who is also author of the "Voter's Guide to Election Polls" about the why polls differ.