Each week, InsideCounsel.com brings you updates on the top legal news stories affecting in-house counsel. Highlights from the week of Jan. 17-21 include: Ohio, Wisconsin, Four More States, Join Challenge to Obama Health Care, about six states winning court approval to join a Florida lawsuit challenging the constitutionality of President Barack Obama's health-care reform legislation.; EPA Loses in Bid to Delay Air Rules, reporting on a federal judge's rejection of the Obama administration's request to delay by more than a year controversial new regulations targeting emissions of mercury and other hazardous air pollutants from industrial boilers; and Obama Launches Rule Review, Pledging to Spur Jobs, Growth, about a Wall Street Journal op-ed article in which the president promised to review regulations viewed as stifling business.