It's always sad when former friends go separate ways. That seems to be what happened with CTA and the ACLU.
From "California Teachers" blog:
"...Beverly Tucker [CTA chief counsel] was chosen multiple times to sit on the Board of Directors of the Northern California ACLU...this is the same Beverly Tucker who refused to defend a teacher who was dismissed for filing grievances and a lawsuit!
"I am in shock. Was it all an act, Beverly, pretending to be interested in constitutional rights? Was the ACLU a stepping stone for you? Was it all a publicity stunt for CTA?"