I would have referenced my own blogfather, Patrick Nielsen Hayden of Electrolite, who mentions this in response to my Mother's Day post, but also reminds us that Republicans hate unions for a reason - the same reason they hate Social Security and want to stop real universal healthcare at any cost.
A lot of people pretend to oppose unions because they allegedly impede the "free market". That's a lie - unions are a natural part of your right to free association and equally a natural part of the market itself, as Kevin Drum explains.