In a by-election in December 1899, Lawson was elected to the
Victorian Legislative Assembly for
Castlemaine as a
Liberal, and represented the district, in its different incarnations, for 28 years. In
June 1904, he was elected to the new
Electoral district of Castlemaine and Maldon, holding the seat until a redistribution in 1927, when he was elected as member for
Castlemaine and Kyneton. Lawson was
President of the Board of Land and Works in the government of
William Watt from 1913 to 1915, and
Attorney-General and
Solicitor-General in the government of
Alexander Peacock from 1915 to 1917. He remained loyal to Peacock when most country Liberal members supported
John Bowser's rural faction, the Economy Party. When Bowser's short-lived government ended with his resignation in March 1918, Lawson succeeded him, also holding the portfolios of Attorney-General and Minister of Labour. Lawson became the longest-serving premier Victoria had seen, holding office for six continuous years, something none of his 26 predecessors had done. That was despite the further fragmentation of the non-
Labor vote with the emergence of the
Country Party. At the
1921 elections, Lawson's
Nationalist Party won 30 seats, to Labor's 20 and the Country Party's 13. Both Labor and the Country Party preferred Lawson to each other, so Lawson was able to survive as a minority Premier. He was helped by Labor's continuing inability to win seats outside its strongholds in the industrial suburbs of Melbourne and a few provincial towns. The biggest test Lawson faced was the
1923 Victorian Police strike, which saw riots and looting in the streets of Melbourne. There was also increasingly bitter industrial strife in Melbourne as the prosperity of the pre-war years failed to return. There were major strikes on the waterfront and in the coal mining industry. Lawson gained a reputation as a tough conservative. He refused to give in to the demands of the police for better pay and conditions, running the risk of a breakdown in law and order, but once the strike was over he appointed a
Royal Commission into police grievances, which gave them much of what they wanted. In September 1923, Lawson formed Victoria's first conservative
coalition, including five Country Party ministers. The coalition broke down in March 1924 when the Country Party made demands Lawson would not accept. The Country Party ministers resigned and united with Labor to bring Lawson down. After unsuccessfully contesting the Speakership, Lawson retired to the back bench, where he stayed until October 1928, when he quit state politics altogether. ==Federal politics==