That’s the scenario gaining steam among liberal Democrats as their presidential front-runner, Hillary Clinton, struggles to win white working-class voters in the race against Sen. Bernie Sanders (I-Vt.).

Though Democrats expect Clinton to ultimately triumph in the race, they are unnerved by Sanders’s upset victory last week in Michigan — a feat he hopes to repeat on Tuesday in the Rust Belt primaries of Ohio, Illinois and Missouri.
With Donald Trump increasingly likely to win the Republican nomination, some Democrats say Clinton needs to consider picking a running mate who can counter his populist appeal.

Enter Sen. Brown, a union champion in the mold of Sanders who represents the crucial swing state of Ohio.

Brown, who spent the weekend campaigning around Ohio with Clinton and her husband, former President Bill Clinton, insists he doesn’t want the promotion. But his disavowals have done little to silence the growing buzz around his name.