Two words: Piss off.
Via Breitbart:
. . .Zakaria asked, “When you hear some of the anti-immigrant language, the rhetoric, do you think it’s racist?”
Nieto answered, “I think it’s discriminatory, yes, and I think it’s unfortunate for a country whose formation and historic origin relies so much on the migration flows of many parts, Europe and Asia, for instance. I think this is a country whose origin to a great extent is one of migration and that’s why it’s unfortunate to hear this exclusionary and discriminatory tones regarding migration flows into the United States.”