BLITZER: Do Mexican police go around asking for papers of people they suspect are illegal immigrants?
CALDERON: Of course! Of course!
BLITZER: If somebody sneaks in from Nicaragua or some other country in Central America through the southern border of Mexico and they wind up in Mexico, they can going get a job?
CALDERON: No, no, no.
BLITZER: They can work?
CALDERON: If somebody do that without permissions, we send — we send back them.