 According to Hager, evidence from undisclosed sources and the leaked e-mails point to a breach of section 221 of the Electoral Act.He further asserts that the book "Postcard From Home", Brash’s biography, was called a "significant marketing tool" by Brash, and that the National-produced "Fairtax postcards" were "exactly the same expense as Labour’s pledge card".In addition, Hager disclosed a letter from the Exclusive brethren to Don Brash and John Key (later head of the National Party) stating that "We are working on 'our/your' campaign full-time" written in May 2005, four months before the election.