According to United States law governing the behavior of 501(c)(3) organizations, it seems highly likely that William Donohue--President of the Catholic League, a 501(c)(3) tax exempt organization--may have broken the law by attempting to intervene in a political campaign.
The IRS document Organizational Test - IRC 501(c)(3) states explicitly that an organization with this tax exempt status cannot intervene in a political campaign.
Despite the legal restrictions on his organization, Donohue appears to be using the Catholic League to campaign against John Edwards bid for the 2008 Democratic nomination for President, in particular the IRS strict prohibition for 501(c)(3)'s on "issue advocacy" as a form of political intervention.
Beyond Donohue's appearances on broadcast media, during which he has spoken out against the John Edwards campaign, The Catholic League which Donohue used its 501(c)(3) non-profit status website to publish the following Press Release that included this explicit attempt to intervene in a political campaign: "Catholic League president Bill Donohue is demanding that presidential hopeful John Edwards fire two recently hired anti-Catholics who have joined his team: Amanda Marcotte as Blogmaster and Melissa McEwan as the Netroots Coordinator."
http://www.talk2action.org/story/2007/2/8/16403/50306I wanted to find out more about this, in particular I wanted to find out what Donohue said about Anti-Catholic bigot, Jerome Corsi, he became famous in 2004 when he was working with the Anti-Kerry Swift Liars. It turns out, he
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Why would he attack Anti-Catholics working for a Democrat, but defend a Republican one?