Card check and the secret ballot

I've been idly wondering liberals were so keen on card check legislation, thinking it a little absurd that they'd want to do away with the option of secret ballots. I thought it was a sign of how badly union leaders have the Dems by the balls. (which doesn't make much sense either, but it's the best I could come up with myself)

However, as Klein explains, the secret ballot option is still there. All this does is prevent employers from requiring the costly, time-consuming procedure if not enough prospective union members wish it.