Youth turnout would not be Obama levels with Hillary as the nominee but it would still be substantial. Obviously Bernie is the candidate who has more enthusiastic youth support. The ones that were sure to vote I'm certain would end up voting Clinton, while there would be some that would not vote or vote Stein for example. But this won't be the demographic that changes this race.
I'm more worried about 30+ year old white people making under 50K an year, that is the demographic that worries me and seems to be the ones flocking to Trump. Alot of these people usually don't vote, but have turned on due to the circus nature of Trump. These people have not seen better times in the last 8 years, and they are also unaffected by the narrative that Obama brought on change for their community. They are disenfranchised and low information. I'm worried that poor white people could swing to Trump and this is what I'm noticing across the Primaries and it's pretty substantial numbers, a lot of people who don't usually vote.
The whole narrative of youth being the biggest problem for Hillary is missing the point really, there are large number of people out there to Trump as their hope for change, it's crude, it's terrifying, but this is what I'm taking away from some of the things I've heard being said about the Trump supporters.
Here is an excerpt from Matt Taibbi -
How America Made Donald Trump Unstoppable
Unions have been abused so much by both parties in the past decades that even mentioning themes union members care about instantly grabs the attention of workers. That's true even when it comes from Donald Trump, a man who kicked off the fourth GOP debate saying "wages [are] too high" and who had the guts to tell the Detroit News that Michigan autoworkers make too much money.
You will find union members scattered at almost all of Trump's speeches. And there have been rumors of unions nationally considering endorsing Trump. SEIU president Mary Kay Henry even admitted in January that Trump appeals to members because of the "terrible anxiety" they feel about jobs.
"I know guys, union guys, who talk about Trump," says Rand Wilson, an activist from the Labor for Bernie organization. "I try to tell them about Sanders, and they don't know who he is. Or they've just heard he's a socialist. Trump they've heard of."