Portside

Bill de Blasio's win in New York's Democratic primary isn't a local story. It's part of a vast shift that could upend three decades of American political thinking. Americans don't necessarily grow more conservative as they age. Sometimes they do. Economic circumstances that have pushed Millennials left are also unlikely to change dramatically anytime soon. de Blasio's mayoral campaign offers a glimpse into what an Occupy-inspired challenge to Clintonism might look like.