NYT:

"The Department of Justice demanded records from the super PAC last week of its finances and its communications with Mrs. Bachmann; Marcus Bachmann, her husband; and former staff members, according to a grand jury subpoena reviewed by The New York Times.

The investigation appears to stem from a complaint a former campaign staff member made to the Federal Election Commission and to the F.B.I. The staff member told of overhearing the president of the super PAC asking a Bachmann senior adviser about buying advertising on radio and TV stations in Des Moines ahead of the Iowa caucus on Jan. 3, 2012.

Coordination between a campaign and a super PAC violates federal election law if it meets certain criteria, said Paul S. Ryan, a senior counsel at the independent Campaign Legal Center.

Mrs. Bachmann is already the subject of a House Ethics Committee investigation into her campaign finances and allegations her staff was improperly used to promote her political biography, “Core of Conviction.”'

Waldron recently published a critical e-book, “Bachmannistan: Behind the Lines.”