Here's a cool site that shows how much money politicians receive from the oil, gas and coal industries, and from where the money came. The visuals are pretty cool; the figures pretty high. Make sure to click on the details — each "bubble" provides more info, as does a chart on the side of each politician's page.
You'll see the following from Montana's delegates:
U.S. U.S. Sen. Max Baucus: $529,992 since 1999.
U.S. Rep. Denny Rehberg: $339,000 since 1999.
U.S. Sen. Jon Tester: Just $22,000 since he was elected in 2006.
Hat tip to former U.S. Senate candidate and longtime environmental activist Paul Richards for the link.