Biden Extends Delegate Lead After Tuesday's Primaries

Maybe you’ve never heard of Livingston County, Michigan. It’s not Oakland County, the vote-rich behemoth located next door; nor is it Macomb County, the much-mythologized home of the culturally conservative “Reagan Democrats” who began defecting to the Republican Party decades ago. It’s a lot less populated, and a little too far from Detroit, to attract much notice from journalists and pundits. And yet, as the returns rolled in Tuesday night from Michigan’s primary, it was Livingston that told the most compelling story. Not for what it said about Bernie Sanders...