By Nick Murray Liberal Leader Mark Carney and Conservative Leader Pierre Poilievre aligned on support for new oil and gas pipelines as a matter of national security during the French language election debate Wednesday night. Dealing with U.S. President Donald Trump was a running theme as the four main federal party leaders took the stage in Montreal for the first of two debates. Even the debate moderator Patrice Roy cited the elephant in the room as he pitched questions on immigration, affordability and Canadian identity. During an exchange on climate change, Poilievre argued Canada needs to build a national pipeline, highlighting how Alberta oil and gas is transported east through pipelines passing into the United States. “Quebecers that buy Alberta oil, it needs to go through the United States, giving…