Marianne Williamson, spiritual leader and author who ran two longshot Democratic presidential campaigns in 2020 and 2024, is running for chair of the Democratic National Committee, framing her run as a way to reimagine the Democratic Party as the party regroups and takes stock of its losses during the 2024 election cycle.

Williamson, 72, is best known for her unconventional, long-shot presidential campaigns in 2020 and 2024, both of which ended with her dropping out early.

Ms. Williamson, 72, most likely faces long odds in her bid for party chair. A number of party officials, including the former Maryland governor Martin O’Malley, are jostling for the job. The current chair, Jaime Harrison, is not seeking re-election. Ms. Williamson is the first woman to formally enter the race.