John McCain’s pollsters at Public opinion Strategies have just released a memo disputing the LA Times/Bloomberg poll by questioning its assumptions about party identification. This still doesn’t explain why McCain is underperforming among conservatives, but in any event, here is an abridged version of the memo (with some charts removed due to space/formatting):
The L.A. Times survey has party identification at 22% Republican, 39% Democrat, and 27% Independent.
The first major concern is that leaves 12% of the survey’s sample unaccounted for. Having double digits don’t know or refused on party ID is a quite unusual finding. Furthermore, since the LA Times does not release other demographics like age and ethnicity, it becomes very difficult for an independent observer to verify whether a survey is methodologically flawed or simply an outlier in public opinion trends.
Second, party identification is greatly out of line with what most other surveys are reporting. Most surveys have a party ID gap in the high single digits / low double digits.
In addition, the PEW Research Center released data from the first two months of 2008 which showed that across 5,566 interviews with registered voters, party ID is 27% Republican, 36% Democrat, and 37% Independent. Given the large sample size, that is a useful barometer by which to measure party identification.
2. If the L.A. Times survey is recalculated to a more normalized range for party identification, McCain would be down in the mid-single digits, which is what we are seeing in most other polls.
McCain’s double digit deficit is not a reflection of reality, simply a result of an unusual party identification result in this survey. The L.A. Times own survey shows that in a head-to-head match-up, McCain is winning the Independents, the crucial swing vote, by eight points (44% McCain – 36% Obama). Given what we are seeing in other surveys, it is almost impossible to believe that McCain is ahead among independents by eight points, yet losing by double digits.
If party identification on the L.A. Times survey is recalculated to just down by ten (29% GOP / 39% Dem / 27% Ind / 5% Don’t Know/Refused), the ballot would be 40% McCain – 47% Obama.
3. Party identification is out of line with historical trends.
While most pollsters will acknowledge that party identification does shift over time, and that Republican identification has declined since 2004, the party identification gap on the recent L.A. Times poll is neither born out by other recent public polls or historical trends.
Even in 2006, when Democrats made big gains in the Congressional elections, Democrats had just a two point advantage on party ID (36% GOP / 38% Dem / 26% Ind).