No, by tradition, the President Pro Tempore of the Senate is the most senior Senator, which means the person who has been a Senator the longest.
Gerald Ford was elected to office as a U.S. Representative in 1949 at the age of 36. He was not elected to the office of Vice President. He was appointed after Spiro Agnew resigned. He was also not elected to the office of President, and became President after Richard Nixon resigned.
63
Jimmy Carter
54
61
35!
In November 2007 when he was elected by the popular vote, and in January 2008 when he was elected by the electoral college, Barack Hussein Obama II was 47 years old, because he was born on August 4th, 1961.
No George Washington was not the oldest president. Ronald Reagan was the oldest elected president at the age of 69 when he was elected to his first term. He ended his presidency a few months before his 78th. George Washington was 57 when he was elected.
When he got elected in 1860, he would have been 51.
He was 56 years old when he was elected president.
President Hayes was 54 when elected and when inaugurated.
William McKinley