#politics
If the TFG proposed policy is to deport entire families, regardless of the citizenship status of children and grandchildren, then what he's saying is:
"You may be a born U.S. citizen, but if even one of your parents is an immigrant, or one of your grandparents is an immigrant, then your citizenship doesn't count, and I can and will deport you if I don't like your politics or if it will thrill the crowds I've whipped up to a frothing hatred."