Democrat Tim Walz and Republican JD Vance will face off next month in the only scheduled U.S. vice presidential debate, a chance for each man to reinforce his running mate's message to voters just weeks before the Nov.

Minnesota Gov. Tim Walz, the Democratic vice-presidential nominee, has accelerated his preparations for his Oct. 1 debate with Sen. JD Vance (R-Ohio), participating in policy sessions and mock debates in his home state and on the road.