Tim Walz and JD Vance will meet for their first and possibly only vice presidential debate Tuesday, in what could be the last debate for both campaigns to argue their case before the election.

The Walz-Vance debate, like the Harris-Trump debate, will be in a studio without an audience but unlike that debate, the candidates' mics will not be routinely muted when it's not their turn to speak -- but the moderators will retain the ability to do so.

While Usha Vance has acted more as a behind-the-scenes adviser, Gwen Walz has been hitting the campaign trail in key swing states as a spokesperson for the Harris-Walz campaign.

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