Anti-war delegates oppose Humphrey’s nomination at the 1968 Democratic Convention in Chicago.

Lunch box created in support of Hubert H. Humphrey's 1968 presidential campaign.

Pin-back button used during Hubert Humphrey’s 1968 presidential campaign.

Vice President Hubert H. Humphrey campaigning for president, 1968.

Martin Luther King and his wife, Coretta Scott King, with Vice President Hubert Humphrey, c. late 1960s.

Vice President Humphrey discussing the Vietnam War with President Johnson and military officials, c.1965.

Hubert H. Humphrey says goodbye to the Minneapolis Mayor's office after winning a seat in the U.S. Senate, November 30, 1948.

Hubert H. Humphrey reads from a pile of telegrams the day after winning a seat in the U.S. Senate, November 3, 1948.

Hubert Humphrey delivers a speech on civil rights at the 1948 Democratic National Convention in Philadelphia.

Minneapolis Mayor Hubert Humphrey throws out the first pitch of a baseball game played by the Minneapolis Millers at Nicollet Park in Minneapolis on April 27, 1948.