A few civic and religious leaders joined their people protesting abuse, discrimination, police violence: Camden and Newark (NJ), Flint (MI), Fargo (ND), Coral Gables (FL), Kansas City (MO), Santa Cruz (CA), and others.
Tweeters reported on their own civic leaders joining protesters. I saw this Forbes article the Sunday morning:
“In Some Cities, Police Officers Joined Protesters Marching Against Brutality,” Lisette Voytko, Forbes, May 31, 2020
Read a Book, Read the Law:
The history of protest goes back to the beginning of human time (check out the Flintstones if you doubt me).