Ever since President Biden ended his reelection bid Sunday, there’s been little doubt about who’s likely to replace him atop the Democratic ticket: Vice President Kamala Harris.

But one mystery remains: Who will Harris recruit as her running mate?

Welcome to the veepstakes. It’s a time-honored Washington tradition. Speculation swirls. Names emerge. Pundits pontificate. Vetting begins. Ultimately, a new political partnership is born.

According to a new Yahoo News/YouGov poll, which was conducted from July 19 to 22, Democrats don’t have a clear favorite for the job — yet. When shown a list of potential Harris running mates and asked to “select all” they would “approve of,” a plurality of voters who identify as Democrats or Democratic-leaning independents answered “not sure” (30%) or “none of the above” (6%).

The next-highest finishers were California Gov. Gavin Newsom (30%), Transportation Secretary Pete Buttigieg (25%) and Michigan Gov. Gretchen Whitmer (24%) — the most familiar names on the list.