Joined by Rep. Alexandria Ocasio-Cortez Friday night, Sen. Bernie Sanders held the largest rally of any 2020 Democratic presidential candidate to date in Iowa, drawing more than 2,400 people to Iowa Western Community College in Council Bluffs.

The campaign and its supporters applauded the evening as the latest evidence of Sanders’s momentum.

“Thousands of Iowans joined together tonight to say loud and clear that it’s time for a fundamental change in this country,” said Bernie 2020 Iowa State Director Misty Rebik. “This is a grassroots movement built to transform this country. Together we’re going to expand the electorate and win the Iowa caucus.”

As they did last month at a rally in Queens, where Ocasio-Cortez officially endorsed the Vermont Independent senator, the two progressives centered the event on a call for solidarity with people of diverse races, class backgrounds, and life experiences.

One key to “expanding the electorate,” Ocasio-Cortez suggested, is to inspire voters to vote to improve the lives of people they may never meet in person.

“Solidarity means, I fight for you and you fight for me,” the freshman congresswoman told the crowd before introducing Sanders.

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“Iowa, you’re the first in the nation, baby,” she added. “You need to set the tone. I need to go back home to the Bronx and tell my community in the Bronx, ‘We need to fight for Iowa.'”