President Barack Obama joked that he may not "feel as warm" toward Canadians as he usually does when both the U.S. men's and women's hockey teams face off against the Canadians in the Olympics.

Speaking today at the North American Leaders Summit, President Barack Obama joked that since his brother-in-law is Canadian, that he has to like Canadians - but with both teams going for gold, the president said he may have to put diplomacy on the side.

"So for a very brief period of time, I might not feel as warm towards Canadians as I normally do - at least until those matches are over," he said.

Obama and Canadian Prime Minister Harper both said they will be "watching tomorrow's Olympic women's hockey game and Friday's Olympic men's hockey game between Canada and the USA with great interest and excitement. They agreed to disagree on who to root for," according to the White House.