It looks like he means Mexicans coming here. So what, we should enforce our laws.
Arer you aware that it's not illegal for Mexicans to enter the U.S.? That there are legal border crossing Mexicans that come into our country every day? How about U.S. citizens crossing into Mexico and then coming back? Stop them too? Stop all international flights between the two countries?
Are illegal crossers the only ones who can carry swine flu?
Read "Raycpa" stats above and see if you still want to close the southern border to all traffic.