OTTAWA—Justin Trudeau wound up a three−day Liberal convention Saturday with a partisan speech that sounded much like the launch of an election campaign. While the prime minister has insisted he has no interest in plunging the country into an election in the midst of the deadly  third wave of COVID−19, his speech was aimed at positioning the governing Liberals as the only party with “real solutions to the real problems” facing Canadians. By contrast, Trudeau portrayed the Conservatives as disconnected climate deniers and peddlers of disinformation with a two−faced leader. And he painted the Bloc Quebecois as a party that’s all talk and no action, a manufacturer of jurisdictional squabbles, incapable of delivering the concrete measures Quebecers need. He did not mention either the New Democrat or Green parties directly, although he urged Liberals to reach out to friends and neighbours who planted “a blue, orange, or green” lawn sign …