List of presidents of the United States by age
The median age upon accession to the presidency is 55 years and 3 months. This is how old Lyndon B. Johnson was at the time of his inauguration. The youngest person to assume the office was Theodore Roosevelt, who became president at the age of , following William McKinley's assassination; the oldest was Donald Trump, who was old at his inauguration. The youngest person to be elected president was John F. Kennedy, at of age on election day; the oldest was Ronald Reagan, who was old at the time of his election to a second term.
Ken Jennings
Jennings again faced controversy when on May 31, 2017 he tweeted a joke involving Barron Trump, the youngest child of U.S. President Donald Trump. According to TMZ, after 11-year-old Barron Trump saw an image of Kathy Griffin holding a bloody Trump mask, he believed it was real and screamed. Jennings wrote, "Barron Trump saw a very long necktie on a heap of expired deli meat in a dumpster. He thought it was his dad & his little heart is breaking." After the tweet garnered controversy, Jennings said, "The joke doesn't mock Barron. It mocks using him for political cover."