Vice President Kamala Harris’ running mate, Minnesota Gov. Tim Walz, was questioned by CNN’s Dana Bash during their joint interview on Thursday evening about the numerous Republican accusations that he distorted various aspects of his personal background. Walz owned up to “mistakes” — but also insisted people keep sight of the real issues at stake in the election. “You had to clarify that you had said that you and your wife used IVF, but it turned out you used a different kind of fertility in order to have children,” said Bash. “And then when you ran for Congress in 2006, your campaign repeate…