He ran as an Action libérale nationale candidate in the district of Montréal–Saint-Henri in the 1935 provincial election and won.
Lauriault refused to join Maurice Duplessis's Union Nationale.
Instead, he ran as an Independent Liberal in the 1936 election and lost against René Labelle.
Lauriault ran as an Independent Liberal in the federal district of Saint-Henri in 1940 and finished second.
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