official estimates, some 3.5 million aliens now live in die United States illegally, and 200,000 to 300,000 more are coming each year. Mexicans and Central Americans account for more than half of the influx, but illegal immigrants also come from Europe, Asia, Africa, South America, and Canada. Congress tried to stem the tide eight years ago strengthening border enforcement and imposing sanctions on employers who knowingly hire illegal aliens. But die Immigration Reform and Control Act of 1986 only...