See Trevor Potter's interview tonight at 10:00 p.m. as PBS's Frontline looks into how the Citizen United decision is playing out in Montana where comparatively little money buys a lot of airtime for attacks ads. The segment looks at the role of big money and secretive outside groups looking to buy results in the races up and down the ticket.
To watch a preview, click here.
To check local listings of stations and times in your area, click here.