Canada's Conservative Party, which would be more in line with Bush administration policies, appeared to gain strength in its quest to end 13 years of Liberal Party rule as campaigning for national elections entered its final week. Opinion polls released Monday show that Stephen Harper's opposition Conservatives were holding an advantage of 8 to 13 percentage points over Prime Minister Paul Martin's Liberal Party — a gap that analysts say will be very difficult for the ruling party to overcome by Jan. 23, when voters will cast ballots for the 308-seat House of Commons.