That was Franklin Pierce whose running mate, Rufus King died before he made it to Washington .
Nobody. A president continues to serve in office when he is impeached. If he is convicted and removed from office, the vice-president becomes president, same as if the president were to die.
Heart Attack or Heart Failure; he was the first Vice-President to die in office.
William Henry Harrison was the first president of the U.S to die in office. The vice president John Tyler took his place.
The Vice-President.
After the President and Vice President die in office, the Speaker of the House will become president. After them, the President Pro Tempore of the Senate. The order of succession goes on and on after this.
The vice president takes office if the president dies.
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James Madison.
If the president and vice president die, the Speaker of the House (who is currently Nancy Pelosi) would take the office of the president.
If both the president and vice president die, the Speaker of the House of Representatives becomes the President of the United States. The new president nominates someone to become the new vice president, and he or she will assume the office of vice president after both houses of Congress confirm the nomination by a majority vote.
The Speaker of the House would become president if both the president and vice-president were unavailable.
William Henry Harrison was the first US president to die in office. He died in 1840.