If President Biden resigns, Vice President Kamala Harris would become the first woman of color to serve as President. This would grant her approximately five to six months to demonstrate her capabilities and leadership, offering voters a chance to evaluate her performance ahead of the next election, potentially strengthening her candidacy if she decides to run for a full term.
On the other hand, if President Biden remains in office, he will continue to implement his policies until the end of his term. This continuity might be preferable to some voters, providing stability and adherence to the current administration's agenda until the President Elect takes office.