Philip Bump, Washington Post:
In January, a CBS News/New York Times poll looked at the enthusiasm of each party, finding that 73 percent of Republicans felt very or somewhat enthusiastic about voting this year, versus 65 percent of Democrats.
It’s still too early to try to predict what will happen in November, especially based on data like this. But if the Democrats want to sweep a new Democrat into the White House this November, they’re going to need to catch up to the Republicans in terms of getting people to the polls. And if Sanders wants that revolution to kick in, he’s going to need to get the enthusiasm of his big crowds to trickle out into the party a bit more.