In advance of Mitt Romney's fundraising swing through Florida Wednesay Democrats are highlighting one of the business ventures of Bain Capital while Romney was in charge: Dade Behring, which, saddled with debt, wound up shuttering two medical technologies facilities in Miami. Some 850 jobs were lost, while Bain walked away with $242-million - an 800 percent return on its investment. In Miami, story of profits and layoffs highlights debate over Mitt Romney's tenure at Bain.