Acting President of the United States On April 4, 1841, only one month after his inauguration, President William Henry Harrison died. He was the first U.S. president to die in office. Afterward, a constitutional crisis ensued over the Constitution's ambiguous presidential succession provision (). Shortly after Harrison's death, his Cabinet met and decided that Vice President John Tyler would assume the responsibilities of presidency under the title "Vice-President acting President". Instead of accepting the Cabinet's proposed title, however, Tyler asserted that the Constitution gave him full and unqualified powers of the office and had himself sworn in immediately as President, setting a critical precedent for an
President of Nigeria President of Nigeria The President of the Federal Republic of Nigeria is the head of state and head of the national executive of Nigeria. The President of Nigeria is also the commander-in-chief of the Nigerian Armed Forces. The President is elected in national elections which take place every four years. The first President of Nigeria was Nnamdi Azikiwe, who took office on October 1, 1963. The current President, Muhammadu Buhari took office on May 29, 2015 as the 15th President of the Federal Republic of Nigeria. As of September of 2018, multiple Nigerian leaders had claimed Muhammadu Buhari died in