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
Science Advisor to the President until 1973. Nixon terminated the committee rather than appointing a replacement for his advisor who had resigned. The US Congress established the Office of Science and Technology Policy in 1976, re-establishing Presidential Science Advisors to the present day. In July 2018, President Donald Trump nominated meteorologist Kelvin Droegemeier for the position. On September 5, 2018, the Senate Committee on Commerce, Science and Transportation voted unanimously to approve Droegemeier's nomination, but he has not yet been confirmed by a vote of the full Senate. The OSTP evolved out of the "'Office of Scientific Research and Development" created in 1941 during World