There is no waiting period. The Vice President takes over immediately, and is sworn in as soon as a Federal Judge can be found to administer the oath. After JFK was murdered Johnson was sworn in a few hours later.
3 yrs
11 presidential electors who vote for the president and vice-president.
2.
In the 1880 presidential election separates electoral votes were cast for president and for vice president. In the presidential election James Garfield received 214 electoral votes and Winfield Hancock received 155 electoral votes. In the vice presidential election Chester Arthur received 214 electoral votes and Winfield Hancock received 155 electoral votes. Chester Arthur succeeded James Garfield upon the latter's assassination.
1,095 days
Lee Harvey Oswald was murdered by Jack Ruby two days after President Kennedy's assassination.
293 days
Theodore Roosevelt became the President of the U.S. He turned out to be a strong President with many "progressive" ideas. He was elected to a term of his own in 1904 .
The Executive Office of the President. (EOP)
Theodore Roosevelt became the President of the U.S. He turned out to be a strong President with many "progressive" ideas. He was elected to a term of his own in 1904 .
JFK was president for 2 years, ten months, and two days.
10 days