How the AP-GfK poll on Vladimir Putin was conducted
The Associated Press-GfK poll on Vladimir Putin and the presidential race was conducted by GfK Public Affairs and Corporate Communications Sept. 15-19.
No more than 1 time in 20 should chance variations in the sample cause the results to vary by more than plus or minus 2.5 percentage points from the answers that would be obtained if all adults in the U.S. were polled.