I've been thinking about Biden quite a bit these past two days. I noted that the new NY Times/Siena poll has his support at 2% in Iowa among those < 45 years old, yet he's still in the top four.
This isn't just in Iowa, there's a WILD difference between old and young voters on the nominee. Honestly I think youth turnout is being underestimated this time around. Oversampling or giving more weight to older voters is technically the correct thing to do based on election data. But political engagement among young people seems to be at an all-time high, and there's a lot of emotions heading into 2020, both in anti-Trump sentiment and in favor of candidates who they believe can have positive impacts for them. I wouldn't be surprised if we see either Sanders or Warren outperform the polls in some of these states.
Also not-that-serious-sidenote but I absolutely hate thinking about Pete Buttigieg's name as Peter Buttigieg