PHOENIX, AZ - MARCH 15:  Democratic presidential candidate Sen. Bernie Sanders (D-VT) speaks to a crowd gathered at the Phoenix Convention Center during a campaign rally on March 15, 2016 in Phoenix, Arizona. Hillary Clinton won the Democratic primary elections in Florida, North Carolina and Ohio, while Missouri and Illinois remain tight races  (Photo by Ralph Freso/Getty Images)

Sanders struggles with big banks question

Bernie Sanders is facing criticism after he didn't offer specifics for how he would fulfill a key campaign promise during a recent interview with the New York Daily News.

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About 

    Dylan Byers is a senior media reporter for CNN Media and CNN Politics

    He was previously a media reporter for POLITICO, and media and tech reporter at Adweek.

    Byers served as a research assistant to Philip Gourevitch, George Packer, and Jane Kramer. He graduated from Bard College in 2008 and lives in Los Angeles, CA.