This is one of those issues where the Catholic Church is not on our side, another being the health care plan (except for the abortion issue).
The modern Catholic Church is still way to interested in government being the charity for the world.
Actually the Catholic Church is against illegal immigration just as it teaches in the Catechism. Don’t be a simpleton and confuse the prudential gum flapping of an apostate like Mahony with the actual teaching of the Church.