Title, I suppose. Congress has the power to regulate interstate commerce. It would be trivial to say, “the railroad companies must provide x many sick and leave days per fiscal year”. Biden did not have to do this. He chose to, and that is what is infuriating and two-faced about his “pro-labor attitude”.
Let’s be frank. Biden is merely trying to look “strong” for the next electoral cycle. It’s class warfare disguised as naked pragmatism.