It shows they can read?

If you set aside the candidates, and read the platform of each party it's clear that the Democrats are much more labor friendly. I'd argue that a fundamental tenant labor unions are to promote an environment that's pro-labor.

The R's platform and the orange fella (two distinctly different platforms), don't offer the same environment for labor to thrive. I'm referring to what's posted on the RNC and Orange Party websites, not the latest youtube post.

Take away the names, and read the platforms and I think it's clear why the union would promote the DNC platform over the others. They filled in a name because that's what's on the ballot (I hope!).