You're right about Margaret Stock being a Democrat running as an Independent.  Edgar Blatchford, running for Senate as a Democrat, said in a recent interview that the Alaska Ds pulled all their support from him when he decided to run for Senate instead of against Don Young.  Why?  Because the Alaska Democrats recruited and are supporting Stock.  

If Margaret Stock were honest, she'd admit that she's just a tool of the Alaska and national Democrats taking advantage of the current political climate.