The Alaska Dispatch, an on-line newspaper in Anchorage, has this story about the contested Libertarian Party primary, and the contested Alaskan Independence Party primary, for U.S. Senate. The primary is August 19.
The Libertarian Party primary for U.S. Senate is between Scott Kohlhaas, Mark Fish, and Thom Walker. The Alaskan Independence Party is between Vic Kohring and Zachary Kile, both of whom are from Wasilla, the city in which Sarah Palin was once Mayor. Kohring is a former 7-term Republican state legislator.
Here is a list of candidates running in Alaska primaries. The Alaskan Independence Party had no candidates for any partisan office in 2012. This year it has no candidates, other than for U.S. Senate. The Libertarian Party this year also has candidates for Governor, Lieutenant Governor, and one state legislative candidate.
The Constitution Party is not ballot-qualified, and is currently petitioning for Governor/Lieutenant Governor. That petition is due August 19.