Pew - "No matter how tight the race, midterm voter turnout likely to remain lackluster"
If you ever wondered by Republicans were working so blatantly to suppress the vote and turnout...
http://www.pewresearch.org/fact-tank/2014/11/04/no-matter-how-tight-the-race-midterm-voter-turnout-likely-to-remain-lackluster/
For all of the money spent on this years midterm elections $3.67 billion, according to the Center for Responsive Politics less than half of eligible voters will actually cast ballots in the nations 435 House districts, if history is any guide.
Political scientists (and practical politicians) long have recognized that voter turnout surges in presidential election years and falls off in midterm elections. In the 2008 presidential election, for example, nearly 59% of estimated eligible voters voted in that years House elections. Two years later for the midterms, only about 41% of eligible voters went to the polls. (We estimated eligible voters in each district from 2006 through 2012 using data from the Census Bureaus American Community Survey, and obtained vote totals for every House race from the House Clerks office. Our analysis excluded a handful of races in which unopposed candidates werent listed on the ballot.)
You might think thered be some relationship between how competitive a given election is and turnout. A race where victory could go either way might spur more interest and rev up get-out-the-vote efforts from both sides; a race where one candidate is a prohibitive favorite could lead many people to conclude theres no point in heading out to vote. But our analysis shows little, if any, correlation between a House elections competitiveness (measured by the winners victory margin) and turnout.
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People who identify with the Republican Party generally are considered more likely to vote, especially in non-presidential years. In a Pew Research Center poll last month, for instance, 77% of registered voters who supported the Republican candidate in their district said they definitely would vote in the election, versus 70% of registered voters who supported the Democratic candidate. And in each of the election years from 2006 through 2012, House districts won by Republicans had slightly higher average turnout than districts won by Democrats.