"For a very brief period of time, I may not feel as warm towards Canadians as I normally do, at least until those matches are over," Obama joked with Canadian Prime Minister Stephan Harper during the North American Leaders Summit.

In what has become an Olympic tradition between the two leaders (Obama sent a case of Yuengling to Canada in 2010), the President and Canadian PM bet cases of beer on the US vs Canada hockey matches.

Of course, the leaders wagered the bet via Twitter:

.@pmharper and I bet on the women's and men's US-Canada hockey games. Winner gets a case of beer for each game. #GoTeamUSA! -bo — The White House (@WhiteHouse) February 20, 2014

I'm betting @barackobama one case of Canadian beer per hockey game this week. #teamusa is good, but #WeAreWinter. #GoCanadaGo @WhiteHouse

— Stephen Harper (@pmharper) February 20, 2014

At the moment, Harper is one case richer as Canada's women's hockey won the gold in Sochi after scoring in overtime for a 3-2 victory. Still, there's room for redemption as the Canada and US men's teams face off in the Olympic semi-finals on Friday.

Although, they should raise the stakes: Losing country keeps Justin Bieber.

Picthx @barackobama