Minnesota Gov. Tim Walz and Ohio Sen. JD Vance will be secondary characters in their own debate.Drew Hallowell/Getty Images; Andrew Harnik/Getty Images; Brandon Bell/Getty Images; Rebecca Zisser/BIOhio Sen. JD Vance and Minnesota Gov. Tim Walz will face off in their long-awaited debate on Oct. 1.The debate comes roughly a month before the hotly-contested November general election.Both Vance and Walz are expected to be aggressive surrogates for their respective running mates.Sen.