Our immigration system is only "overwhelmed" because Congress fails to adequately fund it, like many other government run programs (that help pay for things most American families need). There should be no preference for nuclear families. Not being part of a nuclear family doesn't mean someone is somehow defective. Likewise, being part of a nuclear family doesn't necessarily make someone a better person (think domestic abuse). It's more oversimplification from a GOP that doesn't wish to read or think, that gets by with inspirational fakery and symbolism that means little but makes them look good.