President Joe Biden has ended his reelection bid and endorsed Vice President Kamala Harris to succeed him. Biden said he will finish his term and will address the nation this week.

Harris said she was “honored” to receive the endorsement and vowed to “earn and win” the nomination. She could be the first Black woman and first Asian American to lead the ticket of a major political party. The Biden-Harris campaign has amended filings with the Federal Election Commission to declare her a candidate — a move that would give her access to campaign funds.

It remains unclear whether Harris, who is gaining support, will become the nominee, or how the party will select a candidate. Sources close to Sen. Joe Manchin, a West Virginia independent, have said he’s considering re-registering as a Democrat and throwing his hat into the ring.