Mitt Romney said one of his Bain Capital companies has been so successful it's been praised by First Lady Michelle Obama. Romney’s Aug. 30, 2012, speech at the Republican National Convention in Tampa extolled Bain Capital, the private equity and venture capital firm that fueled his wealth, as "a great American success story." "Some of the companies we helped start are names you know you've have heard from tonight. An office company called Staples, where I'm pleased to see the Obama campaign has been shopping. "The Sports Authority, which of course became ...