Lisa Murkowski was elected by the broad Alaska middle of the road coalition that wrote her in to keep Tea Party Joe Miller out.  Since then she has completely rejected those that put her in office.  In all issues of national substance, there is no difference between Lisa Murkowski and Joe Miller except that Joe would be a one termer and Lisa will probably be Senator for life.  She is a solid vote for the Koch coalition.  She will toe the Koch line because that is where her money comes from.