Immigration is yet another issue which we seem unable to discuss rationally -- in part because words have been twisted beyond recognition in political rhetoric.We can't even call illegal immigrants "illegal immigrants." The politically correct evasion is "undocumented workers."Do American citizens go around carrying documents with them when they work or apply for work? Most Americans are undocumented workers but they are not illegal immigrants. There is a difference.The Bush administration is pushing a program to legalize "guest workers." But what is a guest? Someone you have invited. People who force their way into your home without your permission are...