Center for Public Integrity: “Voters haven’t had a clue who is behind American Tradition Partnership — the Colorado-based group pushing to rewrite Montana’s campaign finance laws — and that’s just the way the secretive nonprofit wants it. A 2010 fundraising pitch to its donors promised that ‘no politician, no bureaucrat, and no radical environmentalist will ever know you helped,’ and ‘the only thing we plan on reporting is our success to contributors like you.'”

More here about one of ATP’s big donors.