(Bloomberg) -- Bernie Sanders is going all in to get out the crowds in Iowa while he’s off the trail.

As the Vermont senator sits in President Trump’s impeachment trial, his campaign will hold “caucus concerts” with popular hipster bands Vampire Weekend and Bon Iver on Jan. 31 and Feb. 1.

The concerts are being advertised with a poster designed as a kind of homage to the 1970s-era Whole Foods Catalog by activist illustrator Molly Crabapple, who previously worked with Occupy Wall Street.

In New Hampshire, meantime, the Sanders campaign is leaning on Ben & Jerry’s co-founders Ben Cohen and Jerry Greenfield, who will host ice cream socials across the state.

This post is part of Campaign Update, our live coverage from the 2020 campaign trail.

To contact the author of this story: Ryan Beckwith in Washington at rbeckwith3@bloomberg.net

To contact the editor responsible for this story: Wendy Benjaminson at wbenjaminson@bloomberg.net, Magan Sherzai

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