英美战争是英国和美国因激烈竞争而引起的一场战争是吗？

求一篇英文的关于英美政体的文章！急！！！！！！！

The United States is a presidential, federal republic, in which the President of the United States (the head of state and head of government), Congress, and judiciary share powers reserved to the national government, and the federal government shares sovereignty with the state governments。 Feder...全部

  The United States is a presidential, federal republic, in which the President of the United States (the head of state and head of government), Congress, and judiciary share powers reserved to the national government, and the federal government shares sovereignty with the state governments。
   Federal and state elections generally take place within a two-party system, although this is not enshrined in law。
   The executive branch is headed by President and is independent of the legislature。 Legislative power is vested in the two chambers of Congress, the Senate and the House of Representatives。
   Judicial power is exercised by the judicial branch (or judiciary), composed of the Supreme Court and lower federal courts。
   The judiciary's function is to interpret the United States Constitution as well as federal laws and regulations。
   This includes resolving disputes between the executive and legislative branches。 The federal government of the United States was established by the Constitution。
   American politics has been dominated by two parties, the Democratic Party and the Republican Party, since the American Civil War, although other parties have also existed。
   Major differences between the political system of the United States and that of most other developed democracies are the power of the Senate as the upper house of the legislature, the wide scope of power of the Supreme Court, the separation of powers between the legislature and the executive government, and the dominance of the two main parties – the United States being one of the world's developed democracies in which third parties have the least political influence。
   Although the U。S。 House of Representatives, along with many other national and state legislatures, developed its initial parliamentary practices based on the model of the British House of Commons, the House of Representatives and the House of Commons have long evolved along quite divergent lines。
   The fundamental purposes of the chambers are different: the House of Commons serves as the forum for the formation and maintenance of the Government which, in turn, is comprised primarily of ministers and deputies drawn from the majority party or block in the House of Commons; the House of Representatives exists as a legislative and oversight forum whose policy preferences may or may not coincide with those of the separately elected government, that is, the presidency and the rest of the executive branch。
   In the House of Commons, the Government’s legislative agenda is, consequently, the agenda of the House of Commons, and few major policy initiatives not formally sanctioned by the Government are considered by the House of Commons。
   In the U。S。
   House, the significant work of the session is the funding and continued maintenance of government programs, but individual Members and individual leaders can influence the House’s agenda to a degree unheard of in the Commons。收起