Your country and its continent are a bad influence. Fortunately, your influence is receding as Europe declines.
The U.S. has a presidential system of government rather than parliamentary. Typically, the head of government in such a system (who is also usually head of state, though in some countries, it is kind of muddled) has more power than the head of government in a parliamentary system...
Boston = City of Champions: Bruins 2011; Celtics 2008; Red Sox 2004, 2007; Patriots 2002, 2004, 2005
Jon Huntsman for President