Democratic Primaries

Sanders’s explanation of why this is not a problem is simple, and he has repeated it endlessly. When a member of the Los Angeles Times editorial board asked him whether “a candidate as far to the left as you” would “alienate swing voters and moderates and independents,” the senator replied: “The only way that you beat Trump is by having an unprecedented campaign, an unprecedentedly large voter turnout.” Faiz Shakir, Sanders’s campaign manager, adds: “Bernie Sanders has very unique appeal amongst [the younger] generation and can inspire, I think, a bunch of them to vote in percentages that they have never voted before.”

This has remarkably little empirical support. Take the 2018 midterm elections, in which the Democrats took back the House (a net 40-seat gain), carried the House popular vote by almost nine points and flipped seven Republican-held governorships. Turnout in that election was outstanding, topping 49 percent — the highest midterm turnout since 1914 and up 13 points over the previous midterm, in 2014 — and the demographic composition of the electorate came remarkably close to that of a presidential election year. (Typically, midterm voters tend to be much older and much whiter than those in presidential elections.) This was due both to fewer presidential “drop-off” voters (people who voted in 2016 but not 2018) and to more midterm “surge” voters (those who voted in 2018 but not 2016)…..

This analysis shreds an implicit assumption of Sanders and other members of the turnout-will-solve-everything crowd: that if they polarize the election by highlighting progressive issues, “their” nonvoters will show up at the polls, but none of the nonvoters from the other side will. That view is also contradicted by many political science studies. Stanford political scientists Andrew Hall and Daniel Thompson, for example, studied House races between 2006 and 2014 and found that highly ideological candidates who beat moderates for a party nomination indeed increased turnout in their own party in the general election — but they increased the opposition turnout even more. (The difference was between three and eight percentage points.) Apparently, their extreme political stances did more to turn out the other side to vote against them than to turn out their own side to vote for them.

The turnout equation does not necessarily return positive results for a candidate like Sanders. The reverse is more likely. It is truly magical thinking to believe that, in a highly polarized situation, only your side gets to increase turnout. And if the other side turns out in droves, you might not like the results — a warning Democrats would be wise to heed.