"In a farcical abuse of common sense and the American taxpayer, the Internal Revenue Service has granted Crossroads GPS, the dark-money machine of Karl Rove, the Republicans’ guru of attack politics, status as a tax-exempt “social welfare” organization. This means it can keep its deep-pocketed campaign donors secret. The ludicrous I.R.S. finding that the group is not primarily what it so obviously is — a strident G.O.P. operation that should be required to name its donors — is essentially a license for it to run amok in the current federal election cycle with anonymous, unlimited donations.The public’s voice is sorely needed on an issue that is at the very heart of concern over an affluent minority’s growing power in American politics. Trying to portray sheer check-writing power as a “social welfare” benefit insults honest taxpayers.