The way it usually works out, organized labor is aligned with the Democrats, and big business is closely connected to the GOP. And it is true that the Dems still march in lockstep with those who are the employees, by and large. However, it’s both Republicans and Democrats who are slugging it out with the corporations.
First of all, when I say “Republicans,” I mean the Trump party. When I say “ultra-conservative,” these days that means “Trump-inspired.” You never hear of ultra-conservative Democrats; their opponents describe them as radical liberals and moderates. I happen to think that’s unfair; those on the far left should be titled the “immoderates,” but that’s another discussion.