In 1932, MacCormick began to make overtures to the right-wing Scottish Party, believing that, as the Scottish Party included a number of members of the Scottish 'establishment', their conversion to the cause of home rule would enhance the credibility of the nationalists.
He resigned from the party in 1942 following his failure to persuade the party to adopt a devolutionist stance rather than supporting all out Scottish independence and due to the victory of Douglas Young over his favoured candidate, William Power, for the leadership of the SNP [REF].