He is the son of trade union activist and Labor Senator from Queensland Bertie Milliner.

In 1940, he was elected to the Australian Senate as a Labor Senator for New South Wales.

In 1910, he was elected to the Australian Senate as a Labor Senator for Victoria.

The end result was one Family First, three Liberal and two Labor Senators elected in Victoria.

The end result was one Green, three Liberal and two Labor Senators elected in Tasmania.

Originally a Labor Senator, he left the party in the wake of the 1916 split over conscription, joining the Nationalist Party.

He was elected in 1958 as a Democratic Labor Senator.

The Bill had the support of anti-Communist Labor Senators, and so passed through Parliament.

After the Labor split over the issue, he became Labor leader in the Senate and the only Labor Senator from 1920 to 1922.

In 1943 he was elected to the Australian Senate as a Labor Senator for South Australia.