The report, which is based largely on published media reports, alleges that Burns has supported legislative favors and directed hundreds of millions of dollars to companies that paid his former staffers more than 20 million dollars in lobbying fees during the same period. A satellite company, for example, paid former Burns staffers more than $1 million in lobbying fees, says the report. Burns then helped pass legislation allowing the company to privatize, the report alleges.

"Senator Burns has been bought and paid for by lobbyists like convicted felon Jack Abramoff and the gang of his former employees that are getting rich off his position in the Senate," says Tester, a farmer and president of the Montana state senate.

Jason Klindt, spokesman for the Burns campaign, said he hadn't read the report but that it seemed like just campaign rhetoric coming out of the Tester campaign. "Montanans know that Sen. Conrad Burns has the seniority and experience to get things done for them for the next six years," says Klindt.

–Danielle Knight