In the 1935 federal election, Gariépy was again the Liberal candidate in the riding (now called Three Rivers). This time, he was elected from a field of six candidates (Bourgeois not among them). On the outbreak of World War II, he broke from the policy of the government of William Lyon MacKenzie King, going so far as to vote against war credits, and when he sought re-election in the 1940 election it was as an Independent Liberal. He was defeated in the two person race by Robert Ryan, the Liberal Party's duly-nominated candidate.