A little backstory here. I was there at the Michigan Democratic Party convention yesterday at Cobo/Huntington Place. At the convention, Democrats had the chance to vote on their parties nominees for the offices of Attorney General, Secretary of State, State Board of Education, and Boards of Regents. The more progressive candidate's won and beat out candidates pushed by the Labor Caucus in some instances and other instances, who the Labor Caucus wanted was the same person that most progressives wanted to win. There were two instances where the progressive choice beat the Labor Caucus choice. One was when Washtenaw County Prosecutor Eli Savit beat out Oakland County Prosecutor Karen McDonald for the Democratic nomination for Michigan Attorney General. Savit is your typical Ann Arbor liberal and has been a reformed-minded prosecutor. The other instance was in the UofM Regents race where, as you mentioned Amir Maklid, beat out the Labor Caucus Choice. In other instances, like the Michigan Secretary of State's race, the choices progressives and labor wanted were aligned, with Garlin Gilchrist winning the SOS nomination.
For years, the Michigan Democratic Party convention process was controlled by labor unions, more specifically labor union leadership of the major unions in the state (UAW, LiUNA, Building Trades Council, Carpenters, MEA, and AFT). More specifically than that, it was controlled by the leadership at the Michigan AFL-CIO (of which many unions belong to like the UAW) and it's President Ron Beiber. Ron Beiber doesn't like progressives. Ron Beiber loves Ron Beiber more than anyone else in the world. He also loves playing kingmaker. And for years the Michigan AFL-CIO, Labor Caucus, and Ron were the kingmakers. If you go back to pre-2016 conventions, there would be 3,000, maybe 3,500 people at most that participated in the convention nominating process. That allowed for Ron, union leadership, and the Labor Caucus more broadly to bring 1,500 or so people to a state party convention and control the nomination process and who wins these races. Now that more people, from all walks of life are showing up to the convention, they don't have the votes to run the show like they used to. This upsets Ron very much.
Yesterday, there were people from all across the state who came. People from local community Democratic Clubs and Congressional District Clubs, and College Democrats chapters. As well, there were people from activist organizations like local Indivisible Chapters, The People's Coalition, Michigan United, Detroit Action, Ranked Choice Voting Michigan, Mop Up Michigan, DSA, etc. With more local Democrats attending and more people from these types of organizations, they aren't going to follow and do what Labor Caucus says to do. Furthermore, when you nominate uninspiring candidates like Karen McDonald, not everyone in Labor Caucus is going to stick with their team. Some of those people voted for people like Eli Savit as well. So the days of labor controlling the party with a handful of voters is over it appears.