Are young voters in play?

[Asian Nazi]

Sanders will continue to win younger (under 30 y.o.) voters.  Maybe not quite by the margin he did in Iowa, but he will definitely continue to carry them.  I wouldn't be surprised if he continues to carry millennials by over 30 points until the day he drops out, though enthusiasm and turnout will taper off if it looks like he has no chance of winning.  But thanks to the proportional system that the Democratic Party uses, he will continue to look competitive for quite some time, even if he doesn't have a real chance.

[Asian Nazi]

One of the reasons I hate Bernie-bots so much is that they keep making these memes to discredit Hillary and drive youth enthusiasm down. They are literally doing the Republicans' job for them.

If Clinton is a weak enough candidate to lose because of internet memes, she never had a chance in the first place.