Ohio Sen. JD Vance, left, and Minnesota Gov. Tim Walz clashed sharply over the Capitol riot and the certification of the 2020 election.Chip Somodevilla/Getty ImagesGov. Tim Walz and Sen. JD Vance had a sharp exchange regarding the January 6, 2021, riot.Walz criticized former President Trump for his efforts to overturn Biden's 2020 election victory.Vance declined to state whether Trump lost the 2020 race and brought up Facebook, which Trump has repeatedly criticized.During Tuesday's vice-presidential debate, Minnesota Gov.