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 the Presidency of Yugoslavia Constitution defined the office of President of the Presidency, but only coming into effect with the disestablishment of the office of President of the Republic. A separate article affirmed Josip Broz Tito with an unlimited mandate which ensured the new President of the Presidency would not come into effect until after his death. Simultaneously an office of Vice President of the Presidency had been in place since 1971 on a rotating annual basis between republican and provincial representatives. When Tito died on 4 May 1980, the then Vice President of the Presidency Lazar Koliševski acceded to the role of President