A GOP-aligned super PAC that formed just three weeks before the election and whose donors remain unknown dropped about $1 million on two key Senate races on Friday, according to recent Federal Election Commission reports.

Freedom Fund North America made the buys opposing two Democratic candidates: Montana Sen. Jon Tester, seen at right, and former North Dakota attorney general Heidi Heitkamp. The super PAC also bought one supporting Rep. Rick Berg, the Republican running against Heitkamp for the state's open Senate seat. The ads do not appear to be available on the web; the group does not have a ...