It hasn’t generated a lot of headlines, but in the world of religion and politics, it’s a pretty big deal. Sen. Chuck Grassley (R-Iowa), the ranking Republican on the Senate Finance Committee, recently asked six high-profile, hyper-wealthy Pentecostal televangelists for their financial records, under the suspicion that they’re using their ministries for personal gain. (Imagine that.) Not surprisingly, most of the televangelists’ ministries have been loath to cooperate with the inquiry. One in particular is pledging a holy war. Sen. Chuck Grassley (R-Iowa) has gone after more than a few iconic nonprofits during his tenure atop the Finance Committee, including...