Hi
Changing the principal applicant was pointless you realize. If either the principal or the dependent fail the medical, both are refused. I would go with the original principal.
The problem is, on top of the health concerns (mostly ok now), Dad is refusing to leave his 'homeland'!!
He wants to stay with his siblings and the daughter there will also care for him. But we want the Mom (who is much younger) to have the opportunity to come to Ca.!
Do they allow for just one to get PR? with the other partner stay back?
If so how can we now change the principal app. to Mom?