The executive power in the federal government is vested in the President of the United States,
 although power is often delegated to the
Cabinet members and other officials.
vice president are elected as
running mates by the
Electoral College, for which each
state, as well as the
District of Columbia, is allocated a number of seats based on its representation (or
ostensible representation, in the case of D.C.) in both houses of Congress.
 The president is limited to a maximum of two four-year terms.
 If the president has already served two years or more of a term to which some other person was elected, he or she may only serve one more additional four-year term.
Seal of the President of the United States
The executive branch consists of the president and those to whom the president's powers are delegated. The president is both the
head of state and
government, as well as the military
commander-in-chief and chief
diplomat. The president, according to the Constitution, must "take care that the laws be faithfully executed", and "preserve, protect and defend the Constitution". The president presides over the executive branch of the federal government, an organization numbering about 5 million people, including 1 million active-duty military personnel and 600,000
postal service employees.
The president may sign legislation passed by Congress into law or may
veto it, preventing it from becoming law unless two-thirds of both houses of Congress vote to override the veto. The president may unilaterally sign
treaties with foreign nations. However,
ratification of international treaties requires a two-thirds majority vote in the Senate. The president may be
impeached by a majority in the House and removed from office by a two-thirds majority in the Senate for "
bribery, or other
high crimes and misdemeanors". The president may not
dissolve Congress or call
special elections but does have the power to
pardon or release criminals convicted of offenses against the federal government (except in cases of impeachment), enact
executive orders, and (with the consent of the Senate) appoint Supreme Court justices and federal judges.
Seal of the Vice President of the United States
The vice president is the second-highest official in rank of the federal government. The office of the vice president's duties and powers are established in the legislative branch of the federal government under Article 1, Section 3, Clauses 4 and 5 as the
President of the Senate; this means that he or she is the head of the Senate. In that capacity, the vice president is allowed to vote in the Senate, but only when necessary to
break a tie vote. Pursuant to the
Twelfth Amendment, the vice president presides over the
joint session of Congress when it convenes to count the vote of the
Electoral College. As first in the
U.S. presidential line of succession, the vice president's duties and powers move to the executive branch when becoming president upon the death, resignation, or removal of the president, which has happened
nine times in U.S. history. Lastly, in the case of a
Twenty-fifth Amendment succession event, the vice president would become acting president, assuming all of the powers and duties of president, except being designated as president. Accordingly, by circumstances, the Constitution designates the vice president as routinely in the legislative branch, or succeeding to the executive branch as president, or possibly being in both as acting president pursuant to the
Twenty-fifth Amendment. Because of circumstances, the overlapping nature of the duties and powers attributed to the office, the title of the office and other matters, such has generated a spirited scholarly dispute regarding attaching an exclusive branch designation to the office of vice president.
Cabinet, executive departments, and agencies
The day-to-day enforcement and administration of federal laws is in the hands of the various
federal executive departments, created by Congress to deal with specific areas of national and international affairs. The heads of the 15 departments, chosen by the president and approved with the "advice and consent" of the U.S. Senate, form a council of advisers generally known as the president's "Cabinet". Once confirmed, these "cabinet officers" serve at the pleasure of the president. In addition to departments, a number of staff organizations are grouped into the
Executive Office of the President. These include the
White House staff, the
National Security Council, the
Office of Management and Budget, the
Council of Economic Advisers, the
Council on Environmental Quality, the
Office of the U.S. Trade Representative, the
Office of National Drug Control Policy, and the
Office of Science and Technology Policy. The employees in these United States government agencies are called
federal civil servants.
There are also
independent agencies such as the
United States Postal Service (USPS), the
National Aeronautics and Space Administration (NASA), the
Central Intelligence Agency (CIA), the
Environmental Protection Agency (EPA), and the
United States Agency for International Development (USAID). In addition, there are
government-owned corporations such as the
Federal Deposit Insurance Corporation and the
National Railroad Passenger Corporation.