This was done for the DSCC:
This survey was fielded on October 29-31, 2010 as a means to measure attitudes towards candidates and races in the 2010 Alaska General Election among likely voters (defined as having voted in at least two of the last four local or statewide elections). 502 likely Alaskan voters were interviewed for each of the four surveys. The margin of error for the data collected is +/- 4.4 % for a 502 response survey for the data analyzed in its entirety with a 95% confidence level; meaning that we can be 95% sure that if every resident of the State of Alaska with working telephone numbers who have at least one member who has voted in at least two of the last four local or state elections was actually surveyed, the results would vary by no more than 4.4% in either direction.
For purposes of disclosure, this survey was paid for in full by the Democratic Senate Campaign Committee.http://www.haysresearch.com/page2/page31/page31.html