After the Vice President, the Speaker of the House of Representatives is the next in line of succession.
The Speaker of the House of Representatives
It did happen several times, and what happened was, the office of Vice President remained vacant until the subsequent election. In terms of Presidential succession, the next person in line (Speaker of the What_if_a_vice_president_died_before_the_25th_amendment) would have "moved up" had the President died or resigned, but that never happened.
The Speaker of the House of Representatives is next in line for the presidency after the vice-president. ( See the related question for the complete line of succession. )(Be aware that there is a procedure for expeditiously filling a vacancy that might occur in the office of Vice-president. The president and vice-president would have to die at almost the same time for this line of succession to apply.)
In the line of succesion to the Presidency after the Vice President is the Speaker of the House.
The Speaker of the House of Representatives is next in line for the presidency following the vice president.
The Speaker of the House of Representatives is next in line for the presidency.
The Speaker of the House of Representatives
The Speaker of the House is next in line after the VP.
The Vice President of the United States. If that position is vacant, the next in line is the Speaker of the House of Represenatives.
The U.S. vice president is first in line to fill the president's unexpired term if the office becomes vacant for any reason.
The Speaker of the House, currently Nancy Pelosi http://www.patriotstoolbox.org/america/presidentiallineofsuccession.htm
Next in line is the Speaker of the House.
After the VP , come that Speaker of the House, the president-pro-tempore of the Senate and the Secretary of State. Keep in mind that there is a procedure for quickly choosing a new Vice-president if that office becomes vacant.
The Speaker of the House is next in line.
3rd in the line of succession would be the Speaker of the House (assuming you meant the president and vice president with "both").
vice president
If the President can not complete his term, the vice-president becomes President. If the vice-president can not complete his term, the president nominates a new vice-president who must be confirmed by both houses of Congress in order to take office. If two were both suddenly killed, the Speaker of the House would become President.