If both the President and Vice President can no longer serve, who becomes President?

If both the President and Vice President can no longer serve, who becomes President?

If both the President and Vice president can't serve, for any reason, the Speaker of the House of Representatives would be next in line for President.

this is due to the Presidential line of succession.

if the president dies, or cannot serve anymore, the people next in line would be:

the confederate at bull run