This billboard says it all...

(click on picture for full size image)

(Click here for more info)

As an aside, I am fortunate to work in a non-union shop, for the simple reason that Teachers unions, in particular the NEA, have turned into an extreme left-wing propaganda arm of the democrat party.

There are a number of teachers I know who are republicans who are pissin' mad because of their money being squandered for causes that they don't believe in (among other things).