If the Teamsters want to forgo any political power in return for less than nothing because their membership likes Trump then that's their business.
So far guys like Hawley and now Vance are trying to walk the line of just enough left wing economic populism (see Vance's previous comments about Elizabeth Warren and Bernie Bros) to court even more blue collar workers. I'm not saying they're genuine in their comments, only that it's clearly their strategy.
This is why the Vance pick is going to be helpful for securing the Midwest rust belt indies and why I LOL when certain members claim that Kamala from CA is going to help Biden keep the blue wall. Utterly detached from reality.