Vice President Kamala Harris is the presumed favorite to top the Democratic ticket after President Joe Biden told the country he will not seek reelection Sunday. 

Harris has received the support of Biden and multiple Democrats to succeed the president, but not everyone in the party has guaranteed their support for her just yet, and Biden’s dropping of his 2024 bid does not guarantee her the spot at the top of the ticket.

Biden’s support of Harris does give her an edge in getting their support, however, delegates are not legally required to stick to the vice president, leaving the door open for other nominees to try their luck at the Democratic National Convention on Aug. 19.