Advice from my Grandfather a member of the United Auto Workers (long time ago)
Unless President Biden gets the heads of the auto manufacturers to step back and negotiate with the auto unions it is looking like a lot of picket lines and support for those lines is going to happen. These strikes have ripple effects beyond Detroit, and the plants with unions. Way back when everything was in Detroit a strike there was local. Then plants were placed all over the United States so strikes could be national.
Today is an important day for solidarity. I am seeing more unions adding they will be sympathetic to the UAW AFofL/CIO, in other words ready to not cross lines or in the case of the Teamsters (my mother is a Teamster), to not deliver products. This will affect the non-union plants, effectively putting the picket lines at those doors too.
All this is important as unions regain popularity, although still not anywhere as strong as in the late Sixties and early Seventies. But, with more young workers joining unions or exploring them, it means more will not cross the lines.
Years ago when I was running for office a local plant was on strike. One day I had a young volunteer with me as I was driving to a function. I stopped at a store to buy some edible support for those on the line and then went back to walk a little with them. My volunteer got a small lesson in unions. Part of my speech was my support for labor and she got to see it in action.
Solidarity!