Vice President Kamala Harris campaigned Thursday in Fayetteville, North Carolina, as President Joe Biden remained in COVID-19 quarantine in Delaware.

Harris’s trip puts her center stage as Biden remains in quarantine while calls for him to exit the 2024 presidential race and as the possibility that she would replace him atop the ticket continue to grow.

Speculation has run rampant over the past three weeks that Biden, facing a slew of negative polls and coming off a disastrous debate performance in June, will soon exit the race, allowing Harris to be nominated by Democrats in August.