I'm not sure this is proof that SEIU knows how to organize. But it might be proof that SEIU is a powerful, effective union - at least in some people's eyes.

 That said, SEIU - it's impossible to deny - is growing and doing a lot to reverse the trend in declining union density. Sometimes their tactics are dubious (virtual sweeheart deals a la CAW's "Magna" contracts). Sometimes they're inspired and effective (Justce for Janitors). A lot of terrain in between.

The "worst union" knock makes absolutely no sense. Hoping aka Mycroft will come back and explain further.

In the meantime, I'll bemoan the fact that - at a point when US labor is about to turn things around - infighting seems to be breaking out everywhere.

That said: there was a lot of infighting and turf wars when John L Lewis was creating the CIO sixty years ago.