Porter was a member of the Ontario Legislature from 1943 to 1958 serving as a representative for Toronto St. George and was appointed Chief Justice in 1958.

[2][3]: 8  He continued his studies in England at Balliol College, Oxford from which he graduated with a master's degree in 1923.

[citation needed] Porter entered politics in 1943 winning a seat in the Legislative Assembly of Ontario representing the downtown Toronto riding of St. George in the 1943 provincial election.

[1] In 1958, Porter left politics to accept an appointment as Chief Justice of the Ontario Court of Appeal.

[1] in his spare time he enjoyed gardening, painting and reading, and had an extensive knowledge of Shakespeare.