Switzerland employs the collegial executive system. In it, the executive is comprised of co-equal councillors. The chairman is called the president, but this office holds no extra power. All executive decisions are made by majority or consensus vote of the executive. Also, the executive is comprised of all parties represented in the legislature in almost proportional way. This acts as an additional check on a single party or person gaining power and suspending the constitution as happens in nearly all other presidential republics (other than the US). I would feel safer with a collective decision on the nuclear button (if we are to even keep nuclear weapons). Further, Switzerland has maintained neutrality, many of the American founders sought to keep neutrality.