It seems the APA has responded to USAPA...
https://public.alliedpilots.org/apa/...-Protocol.aspx
SENIORITY INTEGRATION PROTOCOL: APA proposed a seniority integration protocol agreement today to the US Airline Pilots Association that incorporates USAPA's suggestions and addresses concerns their leadership has expressed. As you will see, the four-party protocol will include American Airlines and US Airways management as signatories. We'll update you once USAPA has responded to our proposal.