Welcome to the Weekly Writ, a round-up of the latest federal and provincial polls, election news and political history that lands in your inbox every Thursday morning.Last week’s announcement of an agreement between the Alberta and federal governments that could see a new west coast pipeline built certainly captured people’s attentions and could have political, economic and environmental repercussions for years (and potentially decades) to come.But the early signals suggest that it hasn’t had much impact on public opinion — yet.From an electoral perspective, the Liberals would be taking a real gamble if the memorandum of understanding (MOU) boiled down to a choice between seats in British Columbia and seats in Alberta. The Liberals won 20 seats in B.C. in the April election but just two in Alberta. Not only that, but the Liberals have far more to lose in B.C. than they have to gain in Alberta.Of the Liberals’…