I showed you a source earlier in the thread and you didn't respond. It is the website of AMA, where they celebrate their success in lobbying against any bill that would allow other professionals expanded capabilities.

"For over 30 years, the AMA’s state and federal advocacy efforts have safeguarded the practice of medicine by opposing nurse practitioner (NP) and other nonphysician professional attempts to inappropriately expand their scope of practice."

Here it is again: https://www.ama-assn.org/practice-management/scope-practice/...

Ah, that prior comment is dead.

So this is a source just saying they oppose inappropriate expansion. That they want PAs and NPs to practice as part of a team that includes a physician. I don't really see this as an issue. I also see PAs, NPs, and nurses as falling into the medical profession and subject to licensing, etc. So I see them as being on the inside of the system, not one of the "other people".

What I was specifically looking for was a source about the second part of this thread - the restriction of residency by the AMA.