Ontario and Quebec combine for a majority of seats in the House of Commons by virtue of Ontario's current population and Quebec's historic population (59 percent of the seats ). As a result, it is very difficult to form even a minority government without substantial support in Ontario and/or Quebec. No party has ever formed a majority government without winning the most seats in either Ontario or Quebec. It is mathematically possible to form a minority government without a strong base in either province, but such an undertaking is politically difficult. The Liberals were the only party with a strong base in both provinces, thus making them the only party capable of forming a government.