Public Policy Polls has released these results for the presidential, U.S. Senate, and U.S. House races in Montana.
For President, when Gary Johnson is included, the results are: Romney 46%, Obama 43%, Johnson 7%, undecided 5%. When Johnson is omitted, the results are: Romney 50%, Obama 45%, 5% undecided.
For U.S. Senate and U.S. House, which are also both 3-way races, the results are: Senate- Democrat Jon Tester 45%, Republican Denny Rehberg 43%, Libertarian Dan Cox 8%, undecided 3%. Also, House- Republican Steve Daines 40%, Democrat Kim Gillan 37%, Libertarian Dave Kaiser 9%, undecided 15%. Thanks to Mike Fellows for the link.