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In Which Economic Indicators Best Predict Presidential Elections?, Nate Silver references a variable called "Incumbent Party Margin of Victory" for US presidential elections. I was wondering, is there a free source for this data?

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Perhaps you could email Nate Silver ( and ask him yourself? That blog contains an email link. – Michael McGowan Nov 18 '11 at 22:52
up vote 4 down vote accepted

For presidential elections, check out David Leip's Atlas of U.S. Presidential Elections. I'm not sure how much he gives away for free, but it's a rich resource.

You might also be interested in the data set used in Caughey and Sekhon (2011). A data appendix is provided in the web appendix of the paper.

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Thank you, that's a fascinating dataset. However, I'm specifically interested in presidential elections. – Zach Nov 20 '11 at 15:34
Right, of course, sorry about that. You might try the resource that I added in an edit. – Charlie Nov 20 '11 at 18:29

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