Some of these political organizations are effectively just Leftist organizations occupying a certain niche.

Raz0rfist described the "Red For Ed" movement, and they were seemingly normal teachers unions who were all emphatically supporting what amounted to a full socialist education program, lead by devout socialists & communists. The giant number of red flags and banners also kinda gave it away.

It's entirely possible that the California Teachers Association is a Leftist organization.