The period between a presidential election and the inauguration is a crucial time in any democracy. If the President-elect dies during this interval, the U.S. Constitution and established laws and procedures dictate a specific order of succession to ensure a seamless transfer of power. This situation, though rare, is planned for in advance to maintain governmental stability.
The significance of having a pre-defined line of succession is paramount for national security and economic stability. Historically, Vice Presidents have stepped into the role of President upon the death of the President. However, the death of a President-elect presents a unique set of challenges and considerations due to the time frame and the un-sworn status of the incoming administration.