who was sworn into office when john f kennedy was assassinated?
Lyndon B. Johnson
contradiction
 2001 – 2002 : Rudy Giuliani and Judith Nathan ; activating the drop was also Giuliani 's final act as mayor . Michael Bloomberg officially became the new Mayor of New York City upon the beginning of 2002 , and took his oath of office shortly after midnight 

entailment
 The assassination of President John F. Kennedy showed the need for a clear way to determine presidential succession in the context of the Cold War . The new President , Lyndon B. Johnson , had once suffered a heart attack , and the next two people in line for the presidency were the 71 year old Speaker of the House John McCormack , and the 86 year old Senate President pro tempore Carl Hayden . Senator Birch Bayh succeeded Kefauver as Chairman of the Subcommittee on Constitutional Amendments and set about advocating for a detailed amendment dealing with presidential succession . 

contradiction
 President Dwight D. Eisenhower attempted to clarify procedures through a signed agreement with Vice President Richard Nixon , drafted by Attorney General Herbert Brownell Jr .. However , this agreement did not have the authority of a constitutional amendment . 

contradiction
 = = = Appointment of Gerald Ford as Vice President ( 1973 ) = = = 

neutral
 After Kennedy 's assassination , Congress altered the Secret Service 's mandate to include protection for presidential candidates . The remaining candidates were immediately protected under an executive order issued by Lyndon Johnson , putting a strain on the poorly resourced Secret Service . 
