Lang was elected leader of New South Wales branch of the Labor Party in 1922 by the NSW party caucus, after two interim leaders had been appointed during a conflict between the NSW state executive of the party, (dominated by the Australian Workers' Union), and the ALP Federal Executive. From very early in his leadership, Lang faced opposition within the caucus due to his domineering manner. Particular areas of contention were the establishment of a Government Insurance Office and Lang's role in an attempt to increase the party's parliamentary majority through the appointment of Alick Kay as the consumer's representative on the Metropolitan Meat Board. However Lang continued to enjoy the overwhelming support of the party branches and he controlled a large majority at the annual conference, which was the party's ultimate forum.