Source:
New York Times/Nate SilverFor the first time since the 1930s, participation in Republican primaries exceeds participation in Democratic primaries, according to a report by the Center for the Study of the American Electorate at American University.
The study, which looked at elections held through Sept. 1 of this year, found that more than four million more voters cast ballots in Republican primaries than in Democratic primaries. While it is unclear whether higher levels of Republican primary participation spell doom for the Democrats in November, a closer look at the data shows reasons for leaders of both parties to be concerned — the number of nonvoters continues to outpace voters. In a primary season where the narrative tends to be about partisanship and anger, the statistics through the end of the summer suggest that voter participation remained relatively consistent with the last couple off-year election cycles.
According to the study, voter turnout rebounded slightly from the 2006 primary season (which, with slightly less than 17 percent of the voting age population voting, holds the record for the lowest turnout for a midterm election on record). It is consistent with turnout from the 1998 and 2002 primaries, in which slightly less than 19 percent of the population voted. Compared to 1994, participation in the 2010 primary runs about two percentage points lower.
Since 1966, when more than 20 percent of the voting-age population voted in Democratic primaries, participation among Democratic primary voters has steadily declined. With the exception of a slight upward blip in 2002 (only one-third of a percentage point), a smaller and smaller percentage of the voting age population has voted in a Democratic primary each year. On the Republican side, the trend appears to be substantially flatter, especially across the last three decades. Still, participation in Republican primaries is down by one-third between 1966 and 2006 (and down by one-sixth between 1966 and 2010).
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http://fivethirtyeight.blogs.nytimes.com/2010/09/14/primary-voter-turnout-stays-low-but-more-so-for-democrats/?hp