I know, and as I told, I am politically syncretic and simply want neutral Wikipedia articles.
For Canada and all other Commonwealth Realms (except for England itself), the monarch appoints a governor-general to take over his or her duties in the realms. Canada and any other country needs a monarchical head of state, because it's a neutral person (and not coming from any party) representing all the People and avoids the country to become a dictatorship. He or she stands for stability, democracy and justice. One only point I don't like on monarchies is that in most of present monarchies the husband of a reigning queen becomes Prince Consort instead of King Consort. That should be changed. And now to the USA: the president is not elected by the People, but by electors. Second, there are only two parties, which have real chances to become ruling parties due to the restrictions of the Constitution. And third, it has a first-past-the-post voting system like in England, which also favors the only two ruling parties. In England, it doesn't matter, because Con. Party and Lab. Party have different aims, while the Rep. and the Dem. Party have very similar aims. Only a few persons in them make exceptions such as Ron Paul, Randall Terry, Rick Santorum or Sarah Palin.   
P.S. And there's a law of which only a few know, which gives the US President the power to pass any proposed law, despite accepted or not by the Congress.