U.S. President Barack Obama and Prime Minister Justin Trudeau ribbed each other on their countries' hockey successes in their remarks at the arrival ceremony for the official visit Thursday, but Twitter users called an offside over their facts. 

Obama joked that Americans and Canadians share many things in common, but there will always be points of contention. 

Some thought that prodding Canada on our teams' lack of Stanley Cup success cut a little too close. 

And others pointed out a glaring problem with Obama touting the Chicago Blackhawks' dynasty as an example of American exceptionalism. 

Trudeau himself pointed out that three of the Hawks' top players — Jonathan Toews, Duncan Keith and Patrick Sharp — are Canadian. But Trudeau erred here, as well. 

But if all that matters is where a team is based, well, that could pose a problem for future U.S.-Canada relations.