"The movement known as the Religious Right is the number-one threat to church-state separation in America. This collection of organizations is well funded and well organized; it uses its massive annual revenue and grassroots troops to undermine the wall of separation in communities nationwide.
Americans United staff members have carefully researched this movement, and here are the 10 Religious Right groups that pose the greatest challenges to church-state separation. Most of these organizations are tax-exempt under Section 501(c)(3) of the tax code, but the financial data includes some affiliated 501(c)(4) lobbying organizations operating alongside the main organizations. The figures come from official IRS filings or other reliable sources."