Four years ago, senator Tom Harkin - Democrat of Iowa - helped get an exemption for the Agriprocessors plant in Postville, without which they might have gone out of business. This year, that company was the subject of a major immigration raid and has subsequently been charged with over 9000 child labor law violations. And, it's not like that was much of a surprise to those in the area. The money, nearly $8 million, came from an environmental program from which Agriprocessors normally would have been disqualified. The grant and loan were used to build a sewage-treatment plant that serves only...