Joe Biden's favorites revealed for Kamala Harris' veepstakes: report

President Joe Biden reportedly has a well-known favorite when it comes to the candidates to become the running mate for presumptive Democratic presidential nominee Kamala Harris.

Biden told reporters Friday morning that he and Harris have talked about the pick — but he left much to the imagination.

“I’ll let her work that out,” Biden replied when asked what she should look for in a running mate.

CNN reported that Biden's top advisers believe Biden has a favorite: Pennsylvania Gov. Josh Shapiro.

Biden is a “big fan" of Shapiro, a senior adviser told the network, particularly due to the importance the battleground state plays in the election.

After Shapiro, Biden reportedly likes Minnesota Gov. Tim Walz.

“He’s just a blast,” the adviser said.

The report comes after the mayor of Philadelphia may have mistakenly revealed Shapiro as Harris' choice.

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Cherelle Parker came out with a new video Friday supporting Vice President Kamala Harris' presidential campaign, leading many to speculate she may have inadvertently revealed Shapiro as the pick for vice presidential candidate. The ad reportedly wasn't supposed to be released for a few more days.

CNN political commentator Van Jones said Thursday that the math adds up for Shapiro, the favorite to become Harris' running mate.

"The math is the math is the math," Jones emphasized on "The Situation Room." Harris is performing "reasonably well" in Michigan and Wisconsin at the moment, but "she's still struggling in Pennsylvania."

"And the brick in that [Blue ]Wall that's the flimsiest, that's the least secure, is Pennsylvania. And she's got a great governor sitting there looking at her right at the top of that state," he said.