Here’s a photograph from the September 20 1934 edition of the Toronto Daily Star of a federal Liberal Party candidate with the (Liberal) Premier of Ontario and the federal Liberal leader.
Wilson Mills (1882-1955) did indeed win the Elgin West by-election, which was held four days after this photo appeared. The by-election was necessary because Mitchell Hepburn had resigned the seat to move to provincial politics. The Elgin West riding was merged into the Elgin riding after this, and Mills won the election in the new riding in 1935 and 1940.
Mills retired from politics when he chose not to run in the 1945 election. When not in politics, he was a farmer and apple grower. He seems to have been associated with nothing particularly memorable or scandalous.