When searching for publications about Canada, it can be helpful to use truncation to search for alternate endings at one time. Searching Canad* (that symbol is an asterisk) will return results for the words: Canada, Canadian and Canadians. Depending on where you are searching, some databases and search engines will only search for exactly what you type, so using truncation is a way to reduce the number of words you need to type.
Use the Internet Archive's Wayback Machine to view archived versions of political party and government websites.