Russell was first elected to the House of Commons of Canada for the electoral district of Halifax in the 1896 general election. A Liberal, he was re-elected in the 1900 election for the electoral district of Hants. In 1904 he was appointed a puisne judge of the Nova Scotia Supreme Court on 3 October 1904. He served until his death in 1935. He was also a noted editor of English Law treatises and author. On 6 March 1918, Russell was approached by an independent Halifax lawyer, Walter Joseph Aloysius O'Hearn, the representative of Francis Mackey, the pilot of the ill-fated SS Mont-Blanc. On 6 December 1917, Mackey's ship, laden with a cargo of highly volatile explosives, collided with SS Imo, a Belgian Relief vessel under Norwegian registry, in Halifax Harbour. The resultant blast decimated the North End of the city and inflicted many casualties. Along with the captain of the vessel, Aimé Le Médec, and the chief examining officer of the port, Commander F. Evan Wyatt, Mackey had been accused of manslaughter and criminal negligence and arrested. The pilot could not afford bail and was thrown in jail. O'Hearn asked Judge Russell to issue a writ of habeas corpus. Russell agreed there was no justification for the charges and released the prisoner on 15 March 1918. As the captain had been arrested on the same warrant, he too was given a written discharge though he had not spent any time in jail. There were many people who were most displeased with Russell's decision, including Attorney General Orlando Tiles Daniels. On 2 April, an attempt by prosecutor, Andrew Cluney, on behalf of the attorney general's office to overturn the decision in the Nova Scotia Supreme Court failed for lack of jurisdiction. Mr. O'Hearn pointed out the lack of jurisdiction from the outset of the proceedings. Four of the five justices, including Chief Justice Edward Robert Harris agreed. Justice Arthur Drysdale was the lone dissenter. Ultimately, Justice Russell's decision was final. The case, In re Mackey, was added as a citation to the Criminal Code of Canada beginning in 1919 under Section 262 entitled, Manslaughter defined. Russell also presided over the Commander Wyatt's grand jury hearing and trial. The trial proceedings took less than a day and ended with an acquittal on both charges. In his autobiography, Russell reflected upon these particular proceedings. He stated: "Civium ardor prava jubentium gave me all that I could do in disposing of the cases with which I was bound to deal. One of these concerned the official in charge of the wiring across the mouth of the harbour. To suppose he had anything in the world to do with the disaster was an utterly lunatic notion. Yet my impression is that the Grand Jury insisted on finding a true bill and placing him on trial. When the bill reached me I got rid of it in the shortest and easiest way possible. It was simply nonsensical, and the fact a grand jury could find it was symptomatic of the condition of the common feeling." Judge Russell's autobiography was published in 1932.
