Checking the site as I write this, it's still not reachable. Doesn't seem to work en francais either.
Source: The Star
With the U.S. election drawing to a close, Canada’s Citizenship and Immigration website appeared to have crashed, or, at least, to be unreachable for many users, due to an “internal server error.”
On Tuesday evening, several users that clicked on the site’s link were immediately redirected to a page reading “there is a problem with the resource you are looking for, and it cannot be displayed.”
Starting at 9 p.m., Google Trends in the U.S. saw a surge in the topic of Canada and the election, amid CNN projections that Republican nominee Donald Trump would take key swing states including Florida.
“Canada immigration” was the 26th most searched query with reports of the immigration website “crashing” gaining traction with Americans.