A federal judge has ordered the Internal Revenue Service to release the names of specific employees involved in targeting Tea Party groups, after years of litigation over what conservatives have long called “chilling” behavior by one of the government’s “most feared” agencies. Judge Reggie B. Walton of the U.S. District Court for the District of Columbia also said the IRS must provide information about which groups were targeted and why, along with a strategy to make sure such targeting doesn’t happen again.