Harvard University’s celebrated pollster John Della Volpe has a message for the new leader of the Democratic Party: Move fast with proven solutions for voters who are hurting, or the party is doomed.

“Millions of Americans aren’t shifting right — they’re walking away. They’re abandoning a Democratic Party and democratic system they believe abandoned them first. This isn’t realignment — it’s abandonment,” the pollster known for his surveys of the youth vote said.