This past week several big companies, including Caterpillar, Verizon, and AT&T, announced that ObamaCare would cost them millions of dollars this year. To pay for it they variously suggested layoffs and benefits reductions. Analysts suggest that the total first-quarter hit to S&P 500 firms will be $4.5 billion. Well, Democrats can't stand to have their precious economy-destroying healthcare program criticized in its very first week, so they've announced an "investigation" into the claims. Late yesterday, the House Subcommittee on Oversight and Investigation sent letters to the CEOs of AT&T, Caterpillar, Deere & Co, and Verizon asking them to appear for...