Last summer, Senator Elizabeth Warren electrified huge crowds at rallies in Seattle, Austin and New York. The events had one thing in common besides her populist pitch for “big structural change.” At each stop, her trademark selfie lines were less than a mile from a Whole Foods Market, a Lululemon Athletica and an Urban Outfitters.

These high-end retailers and brands, popular with urban millennials and affluent suburbanites alike, are increasingly correlated with which neighborhoods are trending blue. The drawback for Democrats? Just 34 percent of U.S. voters — and only 29 percent of battleground state voters — live within five miles of at least one such upmarket retailer, and the Democrats’ brand is stagnant or in decline everywhere else.

Once dominant in labor halls, Democrats are more ascendant than ever near galleria malls. But the reality for Democrats is if they aren’t able to stop their slide in less elite locales, President Trump’s advantage in the Electoral College could further widen relative to the popular vote.