I participated in many of those rallies. I'd say it depends on the area. Newport, Huntington and Yorba Linda are Trump country but Santa Ana, Fullerton, Anaheim, and Irvine are pretty liberal. Many conservatives left the county over the years and it's closer to 50/50 now. I remember a rally in Santa Ana getting really ugly. People were hurling projectiles from cars and some thugs assaulted the Trump supporters.