The operative word being "main".  In the 2014 US Senate election, the Alaska Libertarian candidate got 3.72% of the vote.  For US House against Don Young, 7.61%.  For Lt. Gov, 3.21%.  They maxed out with Cean Stevens running for state house against Geran Tarr.  She got 36.1%.  Those are the only races the Alaska Libertarian Party fielded candidates in.  I maintain the Alaska Libertarian Party is not exactly a "main party".