@fishfingers15
I just went back and looked at historic union voting records. There was an openly racist candidate in 1964 (Goldwater) who set up the strategy the Reublicans have used since then. LBJ was also racist but it was known that he would probably support a civil rights bill. So the choice, around racism, was clear.
That election had the largest gap for union voters between Dems and GOP: 73-27 (+48).
Source. At the same time, college grads were only +4 for the Dems, professionals/business owners were +8, while manual workers were Dem +42. (same source).
Why do you think that was the case, and the gaps are much smaller/non-existent nowadays? Do you think an explanation other than race might explain the trend?
Edit: equally interesting data from the 1968 Nixon Soutehrn strategy/"law and order": union voters went for the Dem +27, manual workers +15, while prof/business went -22 (they voted in favour of Nixon). Union members finally flipped in the 1972 landslide (-8, though in fairness the overall election was -24).
I'm not going to bother looking up more numbers, but I do know they want back to the Dems under Carter in 1976. Then this happened:
And union voters went almost 50-50 for Reagan in 1980.
Again, do you think there is another factor that might fit the union vote better than race?