Ian’s long Agonist post here from September 2007 starts:
Given that it’s Labor Day weekend let’s have a chat about labor – organized labor. If you take a look at the map[ here ], something may jump out at you, as it did me. Where Labor is strong – Democrats tend to win. Where Labor is weak, they don’t. In the last election the electorate split fairly evenly, but amongst the groups that stand out as having gone Democratic, one is Labor. The general election was 49/49, but union members went 64/36 Democratic/Republican.