Vice President of the United States

The vice president of the United States (often referred to as VP or VPOTUS) is the second highest executive officer of the federal government of the United States, after the president. The vice president ranks first in the presidential line of succession and is also the officer of the legislative branch and the president of the Senate and the presiding officer of the Senate.
Kamala Harris is the 49th and current vice president of the United States, in office since January 2021.
Eligibility and requirements
Article II, Section 1, Clause 5 of the constitution states for a person to serve as vice president must:
be a natural-born citizen of the United States.
be at least thirty-five years old.
be a permanent resident in the United States for at least fourteen years.
Election process
The vice president is indirectly elected by the people through the Electoral College to a four-year term, along with the presidential candidate or the incumbent president of the United States as their running mate. The presidential candidate or incumbent president must have at least 270 electoral college votes in order to win the election.
Vice President-elect of the United States
The vice president-elect of the United States is the candidate who has won the United States presidential election along with the presidential candidate and is awaiting inauguration to become the vice president.
Inauguration
The president elect, vice president-elect, or incumbent president and vice president immediately began their four-year team on inauguration day every four years on January 20. The original inauguration date was held on March 4, but was later changed in 1933.
Presidential line of succession
The vice president ranks first in the presidential line of succession, if the president dies, resigns, or is impeached. Only eight vice presidents have succeeded the president in resignation or death such as, John Tyler, Millard Fillmore, Andrew Johnson, Chester A. Arthur, Theodore Roosevelt, Calvin Coolidge, Harry S. Truman, Lyndon B. Johnson, and Gerald Ford.
Although it's unclear who succeeds the vice president in resignation, death or impeachment, but the speaker of the house might rank in the succession.
John C. Calhoun and Spiro Agnew are the only U.S. vice presidents to have resigned from office.
Office of the Vice President
The Office of the Vice President includes personnel staff who directly support or advise the vice president of the United States. It is primarily office is in the Eisenhower Executive Office Building with offices for the vice president also in the West Wing of the White House, the United States Capitol, and in the vice president's official residence.
Travel and Transportation
Although any U.S. Air Force aircraft the vice president is aboard is referred to as "Air Force Two", during of the flight. In-country trips are typically handled with just one of the two planes, while overseas trips are handled with both.
Residence
Number One Observatory Circle is the official residence of the vice president and the second family. It has been the official residence of every U.S. vice president since Nelson Rockefeller in 1974.
Protection
The United States Secret Service is in charge of protecting the vice president and the second family at all times.
Living former vice presidents of the United States
As of 2023, there are only five living former vice presidents.
The most recent former vice president to die was Walter Mondale (1977-1981) on April 19, 2021 at the age of 93.
References
Government of the United States
Vice Presidents of the United States