John Mackie was born on 8th January, 1898. He was educated at Harrow and Christ Church, Oxford. A member of the Conservative Party, he was elected to to the House of Commons in October 1931. He became involved in right-wing politics and constantly argued that the real threat was the Soviet Union and that Germany should have her colonies returned.
In May 1939 Archibald Ramsay founded a secret society called the Right Club. This was an attempt to unify all the different right-wing groups in Britain. Or in the leader's words of "co-ordinating the work of all the patriotic societies". In his autobiography, The Nameless War, Ramsay argued: "The main object of the Right Club was to oppose and expose the activities of Organized Jewry, in the light of the evidence which came into my possession in 1938. Our first objective was to clear the Conservative Party of Jewish influence, and the character of our membership and meetings were strictly in keeping with this objective."
Members of the Right Club included Mackie, William Joyce, Anna Wolkoff, Joan Miller, A. K. Chesterton, Francis Yeats-Brown, Lord Redesdale, 5th Duke of Wellington, Duke of Westminster, E. H. Cole, John Stourton, Thomas Hunter, Aubrey Lees, Ernest Bennett, Charles Kerr, Samuel Chapman, James Edmondson, Mavis Tate, Marquess of Graham, Margaret Bothamley, Earl of Galloway, H. T. Mills, Richard Findlay and Serrocold Skeels.
Mackie was deselected by the Conservative Party in 1945. He contested the seat as an Independent Conservative and defeated the official candidate. The Conservative Whip was restored in March, 1948.
John Mackie held his seat in the House of Commons until his death on 29th December, 1958.