1: As Biden exits, Kamala Harris steps up.

2: Harris faces new challenges in leadership role.

3: Will Harris be the next president?

4: Impact of Biden's departure on Harris's future.

5: Harris's response to Biden's shocking exit.

6: What's next for Vice President Kamala Harris?

7: Potential for Harris to make history.

8: Harris's rise to power after Biden's exit.

9: The future of America under Kamala Harris.