Personally, I'd say to focus on American children first. Kind of the idea that we should help our own before helping everyone else. Maybe that's just me though.
Authorities say at any given time there're over 100,000 adoptable children in the USA. Should celebrities and regular folks adopt American children first? IMO I say adopt American Children First.
Of course American children must come first! We need to take care of kids of this land first! Then others will be thinkable.
I remember talking to my mother in law about this issue. I went on and on. "We must take care of our own." We need to come first!" While I still hold steadfast about that position,my mother in law who is very wise and has her moments of beautiful compassion and love said to me very simply, "A child in need is just that, a child in need." One hungry child is the same as any other, help wherever and whenever you can."
Good question as I've often wondered the same thing myself ! I think they should adopt American children first. Just my thought though.
People that want to adopt should do so with kids that are from their own country. One reason for the foreign adoptions by Americans is that adoption from those countries is much easier, less costly and much less paperwork.