From 1915 to 1928 Fuller represented Wollondilly for the Liberal Party and, from 1916, the Nationalist Party. In the part of 1916 and 1917, he was a leader of New South Wales' Nationalist Party and he became Colonial Secretary (the second most important cabinet position) in 1916.
In 1917, his heavy-handed handling of a strike by rail and tramway workers against the introduction of time cards antagonised the unions and led to a general strike. His promise of higher pay and improved seniority benefits to workers returning to work split the rail unions for most of the twentieth century and the different employment conditions lasted until the Lang Government was elected. His action was seen by supporters as the decisive leadership required in wartime. In 1919, he expanded the state-owned fishing trawler fleet "to provide cheap fish for the mass of the population".[2]
Labor won the 1920 election and Fuller became Leader of the Opposition. In 1921 he took advantage of the death of John Storey to defeat James Dooley's Government on a motion of no confidence and as a result was asked to form a government. But Fuller himself had to give up the Premiership after only seven hours, after losing another motion of no confidence and Dooley returned to office.[2]
In the 1922 state election, Dooley was defeated and Fuller became Premier once again. His government began the construction of the Sydney Harbour Bridge. This time his tenure lasted till the 1925 state election, won by Labor's Jack Lang.[citation needed]
Later years
Shortly after Lang's victory, Fuller resigned from the Nationalist leadership in favour of Thomas Bavin. From 1928 to 1931 he was the state's Agent-General in London. He died in the Sydney suburb of Darlinghurst.[2]