Must-read NYT report: “During the 2010 midterm elections, tax-exempt groups outspent super PACs by a 3-to-2 margin, according to a recent study by the Center for Responsive Politics and the Center for Public Integrity, with most of that money devoted to attacking Democrats or defending Republicans. And such groups have accounted for two-thirds of the political advertising bought by the biggest outside spenders so far in the 2012 election cycle, according to Kantar Media’s Campaign Media Analysis Group, with close to $100 million in issue ads.”