Even though this question fails to have specificity, it can be answered with regards to the United States. State governments do not have the authority or duty to enact legislation that is specified in the US Constitution to be the duty of the Federal government. For example, the creation of treaties between US states and foreign governments is a duty only allowed for the US government to handle. Another area lies in taxation. Tariffs are handled by the Federal government. US states have no role in tariffs.
It is also the duty of the vice president to preside over the Senate.
The first duty of the President is to preserve, protect and defend the Constitution of the United States. Before the President takes office he swears this oath on the Bible.
One of the most important duties of the President is to ensure that all laws are faithfully executed. He also has the power to sign or veto legislation.
The President's primary duty is to make sure U.S. laws are followed and federal government operations are effective. In addition, the President approves and sign legislative bills into law and commands the U.S. Armed Services.
President
The vice president's special duty is to be president of the Senate.
One duty of the President is to sign a bill into a law. Another duty is to be Commander in Chief of the US military.
It is also the duty of the vice president to preside over the Senate.
It is the House of Representative's duty to charge the president with impeachment. It is also the Senate duty too, but mostly the House of Representative's duty ;)
He Is the president of the United States or the US for short.
His only responsibility if to make the deciding vote in the Senate as the President of the Senate if there is ever a tie on legislation. His other duty is to take over as President should something happen to the sitting President.
He only real duty is to chair the US Senate, but I am not sure that is an executive duty, Of course, he becomes the chief executive if something happens to the President. He may be given executive assignments by the President on occasion.
chief justice of india
No, it is the duty of the courts to punish citizens for treason.
yel7as teezi
Paliament
to be a back up if the president gets sick or dies.