While holding a press briefing as Karoline Leavitt is on maternity leave, Vice President JD Vance jokes about switching roles with the White House press secretary.

Vance jokes about the deal he made with Karoline Leavitt for filling in behind the podium in the the White House briefing room:

"I told Karoline I would stand in for her today for the White House press briefing on the condition that when........

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