Danny Goldberg, author of the new book "Liberals with Attitude: The Rodney King Beating and the Fight for the Soul of Los Angeles," was there in 1991 when an unlikely Los Angeles coalition fought to hold the city's police department accountable for the beating of Rodney King. Thirty-four years later, after George Floyd and the recent events in Minneapolis, Goldberg wonders whether the sort of cross-ideological cooperation that happened in the 1990s is still possible today.