Reply #43: Is Nate Silver A Member Of FauxNews? [View All]

Generic Ballot Points Toward Possible 50+ Seat Loss for Democrats


A couple of weeks ago, we examined the potential upside case for Democrats in November's midterms. If the party were able to limit their losses to about 20 House seats and 3-4 Senate seats, it might not have as deleterious an effect on their policy agenda as you might think.


...

Their bad news is that the House popular vote (a tabulation of the actual votes all around the country) and the generic ballot (an abstraction in the form of a poll) are not the same thing -- and the difference usually tends to work to Democrats' detriment. Although analysts debate the precise magnitude of the difference, on average the generic ballot has overestimated the Democrats' performance in the popular vote by 3.4 points since 1992. If the pattern holds, that means that a 2.3-point deficit in generic ballot polls would translate to a 5.7 point deficit in the popular vote -- which works out to a loss of 51 seats, according to our regression model.


http://www.fivethirtyeight.com/2010/04/generic-ballot-points-toward-possible.html