The 25th Amendment to the constitution had not yet been passed so there was no legal method of appointing a vice president outside of an election.
vice president
John Adams replaced Washington as president and Thomas Jefferson became vice president in 1797.
A Vice-President can be replaced only upon resignation or impeachment.
The Vice President.
The vice president
He only had one: Lyndon B. Johnson.
Lyndon Baines Johnson, longtime senator from Texas, was Kennedy's Vice President. He therefore became President upon Kennedy's death.Lyndon B. JohnsonLyndon Baynes Johnson (LBJ) was Vice-President under John F. Kennedy (JFK)VP Lyndon JohnsonLyndon B Johnson
Gerald Ford replaced Richard Nixon after his resignation. Following the assassination of John F Kennedy, the Vice-President Lyndon Baines Johnson became President. Theodore Roosevelt replaced William McKinley after his assassination, Andrew Johnson replace Abraham Lincoln after his assassination and John Tyler replaced William Henry Harrison. Also, I believe, Harold Holt (the Australian prime-minister, one that went missing) had his vice-president take over.
John Adams was the president under whom Thomas Jefferson was Vice-President. From 1797 to 1801 John Adams was the President .Thomas Jefferson was the vice president of John Adams from 1797-1801. Later Jefferson became the president from 1801-1809.
vice-president
Gerald Ford replaced Spiro Agnew as Vice president and later replaced Richard Nixon as president.
hmmm well you didn't finish your question so I will list all presidents that were assassinated and who took over their position. After President Lincoln was assassinated Vice President Andrew Johnson took over. After President Garfield was assassinated Vice President Chester A Arther took over. After President William McKinley was assassinated Vice President Theodore Roosevelt took over. And Finally, after President John F Kennedy was assassinated Vice President Lyndon B Johnson took over. These are presidents who just died during office, they weren't assassinated. President William Henry Harrison was replaced by Vice President John Tyler. (died of pneumonia) President Zachery Taylor was replaced by Vice President Millard Fillmore. (died of food poisoning at picnic.) President Harding was replaced by Vice President Calvin Coolidge. (heart attack) President Franklin D Roosevelt was replaced by Vice President Truman. (died of cerebral hemmorage)