Libertarian endorses Rosendale in Senate race

Libertarian Rick Breckenridge on Wednesday threw his support behind Republican candidate Matt Rosendale, saying he was standing up against “dark money” in politics.Breckenridge said he was angry about a recent anonymous campaign mailer that said if Rosendale were elected, it would lead to more government surveillance and that voters should cast votes for Breckenridge instead.

"Matt Rosendale wants to use drones and patrols to spy on our private lives," the mailer reads. "Rick Breckenridge is a true conservative and opposes government intrusion into Montanans' private lives." 

GOP officials said there were no names attached to the mailer, which arrived in mailboxes Tuesday, nor was it known how many were sent out. The lack of a name is a violation of state and federal election laws.

Dark money is where the donor is not disclosed and the source of the money is unknown. Rosendale's campaign staff said a complaint with the Federal Election Commission will be filed shortly.