Days before Joe Biden is set to announce his running mate, Democrats including confidants of the former vice president say the race is fluid, with different candidates gaining or losing momentum.

Three candidates — Sen. Kamala Harris (D-Calif.), former national security adviser Susan Rice and Rep. Karen Bass (D-Calif.) — are seen as the top candidates in contention.

But Michigan Gov. Gretchen Whitmer, who was seen as a front-runner in the spring but seemed to fade from the spotlight, is still very much in the race, said several sources.

Read more at The Hill.