"What difference" "does it make?"
Way to reach out to minority voters, GOP. First there was calling any woman who wants birth control to be part of their health plan a slut. Then came the CPAC rant saying Slavery was good for them thar Black folk. Today, they're calling Mexicans derogatory names. All we need next week is someone in the party calling SCOTUS a bunch of Homos after they overturn DOMA.
buena suerte GOP ...
If they were illegal (or 'unlawful' if you prefer) immigrants, then they were wetbacks. I don't see the problem here or the need for an apology. That's not a racial/ethnic slur.