Today’s post is from David W. Moore, author of The Opinion Makers: An Insider Exposes the Truth Behind the Polls (out in hardcover now, paperback with a new afterword available this fall). Moore is a senior fellow of the Carsey Institute at the University of New Hampshire. A former senior editor of the Gallup Poll, where he worked for thirteen years, Moore also served as professor of political science at UNH and is the founder and former director of the UNH Survey Center.
It would be a political miracle if the Democrats did not lose seats in the 2010 Congressional elections, yet the polls so far suggest that scenario is doubtful at best. I think it’s because most polls are providing a rosier picture for the Democrats by reporting voting intentions of the general public, or registered voters, rather than the much smaller segment of “likely voters” that will ultimately turn out to cast a ballot.
That the Democrats will almost certainly lose House seats in 2010 is attested to by several factors. The most important, of course, is that since the advent of the current two party system (Republicans and Democrats), the party of the president almost always loses seats in a mid-term election. The best theory for this phenomenon is that disgruntled people (i.e., those who identify with the “out” party) are more motivated to cast a protest vote than the relatively satisfied people (i.e., those who identify with the party of the president) are to cast a vote of support.
The second factor is that, in the wake of the protracted war in Iraq and the sagging economy, Democrats won many seats in 2006 and 2008 that would “normally” go to Republicans. In 2010, with Bush gone and a Democratic administration in charge, Democratic House members in those “normally” Republican seats are going to be quite vulnerable.
The final factor is that as a general rule, Republicans are more likely to turn out than Democrats, because Republicans tend to be higher on the socio-economic scale – generally more educated, with higher incomes, and more actively involved in politics than Democrats.
So, if all of these reinforcing factors suggest the Republicans are likely to gain seats, why aren’t the polls showing that? After the jump, some interesting recent poll results (see pollingreport.com).