President Biden has another Democratic challenger vying for the presidency following Robert F. Kennedy Jr. filing paperwork with the Federal Election Commission on Wednesday.

Kennedy, the son of former U.S. Attorney General Robert F. Kennedy and nephew of the late former President John F. Kennedy, is now the second Democrat to toss his hat into the race for the White House, joining spiritual advisor and author Marianne Williamson in seeking the party’s nomination.

Biden has yet to announce whether he will run for reelection, however, the White House has repeatedly said Biden intends to run for a second term.