Chart of the Day: Democratic Losses in 2010

Facts matter: Sign up for the free Mother Jones Daily newsletter. Support our nonprofit reporting. Subscribe to our print magazine.

So how should Democrats expect to do this year? Douglas Hibbs has one of the most famous equations for forecasting midterm elections, and it has four terms for predicting the partisan division in the House:

The in-party is expected to win a baseline constant of 62 seats, plus a number of seats equal to about 62% of the number won at the previous on-year election (the incumbency effect), minus around 1.4 seats for every percentage point of the sitting president’?s vote margin in the previous on-year election (the balance effect), plus almost 10 seats for every percentage point of growth in per capita real disposable personal income over the congressional term.

In other words, taking an educated guess that income growth in Q3 will be -3% and therefore income growth for the entire congressional term will clock in at 0.1%:

62 + .62*256 -1.4*7.4 + 0.1*9.7 = 211.33 Democratic seats

I have helpfully put this into chart format below, extending Hibbs’s chart for 1950-2006 to include next week’s election. Why does this matter? As Jon Chait says, it should anchor our expectations and provide a healthy dose of skepticism toward the various narratives that pundits will trot out after the election to explain things:

The point is not that structural factors determine everything, and that policies or communication or other tactical decisions have no impact. The point is to center the discussion around a realistic baseline…..It’s worth keeping in mind beforehand a clear sense of what sort of result we would expect if the president’s policies and political strategy made no difference at all. That’s about a 45 seat loss….If you want to have the “what did Obama do wrong” argument, you first need to establish what “wrong” would look like.

Chait thinks that the Hibbs prediction of 45 seats is too low, but I’m willing to go ahead and accept it. Basically, it provides a reasonable baseline. If Democrats lose 50 seats, it’s fair to say they did something tactically wrong. But that “something wrong” only cost them five seats. Aside from that, they blew it by not being more aggressive about stimulating the economy. Unfortunately, that mistake was mostly made during Obama’s first year in office. By the time 2010 rolled around, there wasn’t much left they could do about that.

THE END...

of our fiscal year is Thursday, June 30, and we have a much larger fundraising gap than we can easily manage with only days left to go.

Right now is no time to come up short: If you value the hard-hitting, democracy-protecting, justice-advancing journalism you get from Mother Jones, please help us keep charging as hard as we possibly can with a much-needed and much-appreciated donation today.

payment methods

THE END...

of our fiscal year is Thursday, June 30, and we have a much larger fundraising gap than we can easily manage with only days left to go.

Right now is no time to come up short: If you value the hard-hitting, democracy-protecting, justice-advancing journalism you get from Mother Jones, please help us keep charging as hard as we possibly can with a much-needed and much-appreciated donation today.

payment methods

We Recommend

Latest

Sign up for our free newsletter

Subscribe to the Mother Jones Daily to have our top stories delivered directly to your inbox.

Get our award-winning magazine

Save big on a full year of investigations, ideas, and insights.

Subscribe

Support our journalism

Help Mother Jones' reporters dig deep with a tax-deductible donation.

Donate