For months, signs have pointed to Democratic gains in the November midterm elections. But those gains also will depend on turning out Democratic voters. Among the challenges Democrats face: getting young voters to the polls.

Younger voters lean toward the Democratic Party, on average, but their turnout typically drops in midterm elections more than that of older groups. For example, between 2012 and 2014, turnout among those 60 and older fell 16 points. But turnout among those from ages 18 to 29 fell 25 points. In 2014, 16 percent of these youngest voters reported voting.

What, if anything, might make this year different? Is it even possible to get young people to vote? Here are four lessons from political science research…

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