“I promise to you,” President Joe Biden said this week in a speech at the AFL-CIO’s annual convention, “for as long as I have this job, I will be the most pro-union president in history.”

He’s got the credentials to say that to this crowd because he’s delivered on many of its priorities: a sizable investment in infrastructure and a significant expansion of Buy America rules. And it’s not insignificant, for example, that he has hosted Amazon Labor Union leaders in the Oval Office. That’s the kind of tone-shifting gesture that can improve organizing conditions on the ground.