Who says the NFAP is "always interesting and influential"?
I had never heard of them before this article suddenly turned up in a couple different threads on allnurses ... However, a quick visit to their website shows that they have an obvious pro-business, pro-immigration agenda and bias, so I will choose to take anything they have to say on how immigration benefits (or, at least, doesn't harm) American nurses with a large helping of salt.
As Mark Twain used to say, "There are three kinds of lies: lies, damned lies, and statistics." Nowadays, anyone can find numbers somewhere
that will support any position they choose to take.