President Joe Biden and Vice President Kamala Harris on Saturday both marked the one-year anniversary of U.S. Rep. John Lewis’ death by urging Congress to honor the legacy of the civil rights icon by enacting laws to protect voting rights.

John Lewis, a lion of the civil rights movement whose bloody beating by Alabama state troopers in 1965 helped galvanize opposition to racial segregation, and who went on to a long and celebrated career in Congress, has died. He was 80.