What's nice is that the US Chamber of Commerce is making it very clear that they are anti-employee. No need to try to figure that out -- they're screaming it loud and clear for everyone to see.
USCoC works for businesses, not employees or customers, and non-compete contracts are meant for the protection of employers only. That anyone might have thought that USCoC might have been pro-employee should have been understood before.
Unless I'm reading this wrong, this could boil down to a question of Chevron deference, end up at SCOTUS, and create a real shit-show if SCOTUS strikes down Chevron deference.