ProPublica has this story about groups that wanted to help Montana U.S. Senator Jon Tester get re-elected in November 2012. So, they made independent expenditures in favor of the Libertarian in the race, Dan Cox.
The story is not completely accurate; it says that the Libertarian nominee for U.S. Senate received more votes than any other Libertarian in the 2012 election, but actually the Libertarian running for Clerk of the Montana Supreme Court received more votes than Cox did.
One wonders why Montana Republicans, who have majorities in both houses of the state legislature, don’t introduce a bill for Ranked Choice Voting, or Approval Voting. Thanks to Rick Hasen for the link.