The Alliance Defense Fund (ADF), an Arizona nonprofit, has started an effort to encourage ministers to "use their pulpits to preach about election candidates this September." 501(c)(3) nonprofits, including churches, are prohibited from endorsing or publicly opposing political candidates or intervening in candidates' elections. The group would like if one sermon prompts an Internal Revenue Service (IRS) investigation that becomes a court battle, leading towards an outcome ruling the tax provision unconstitutional. The ADF press release states; "The new initiative will equip, protect, and defend pastors who wish to exercise their First Amendment right to openly discuss the positions of political candidates and other moral and social issues from the pulpit. Participating pastors across the country will deliver a sermon along these lines in their own churches Sept. 28." The Wall Street Journal reports; "Alliance fund staff hopes 40 or 50 houses of worship will take part in the action, including clerics from liberal-leaning congregations. About 80 ministers have expressed interest, including one Catholic priest, says Erik Stanley, the Alliance's senior legal counsel." Americans United for Separation of Church and State (AU) responded with a press release denouncing the initiative, saying the "Religious Right group's plan to ask churches to violate federal tax law on electioneering is deplorable."