The Executive Magistrate of the United States is the highest official of the United States Government. He is comparable to a Prime Minister in most systems, in that he is elected by the congress (legislature), and usually of the largest party in the congress. He is unlike most prime ministers, however, in that he is elected to a four-year term and limited to only one. Additionally, he can not be recalled simply by losing the confidence of the Congress.
It is not uncommon for coalitions of several parties to nominate an Executive Magistrate from parties which are not necessarily dominant in the coalition. This usually happens when one coalition is clearly running together for re-election, such as the New Deal coalition, which governed from 1933 to 1949 and was led at different time from personages from three different parties.