Socialists and unionists are synonyms in modern-day America.
Via Marathon Pundit:
For members of the Chicago Teachers Union there are four Rs: reading, ‘riting, ‘rithmatc–and radicalism. […]
But the Occupy-endorsing Chicago Teachers Union is made up of members who are well-versed in left-wing radicalism. And for those teachers who aren’t–they have an opportunity to improve their skills on Saturday at the Teaching for Social Justice Curriculum Fair. For the unenlightened, “social justice” is a catch-all term for extreme-left politics. And the fair, organized by Teachers for Social Justice, is being co-sponsored by the CTU.