Democratic Gov. Tim Walz of Minnesota claimed during a Friday interview that voters didn’t need to be concerned about how Vice President Kamala Harris differs from President Joe Biden. Walz was interviewed by WPVI anchor Brian Taff during a campaign swing through five states that included the crucial battleground state of Pennsylvania. Taff asked Walz to provide details on the key differences between Harris and Biden, but instead Walz attacked former President Donald Trump. “The difference between Kamala Harris and Joe Biden is not what [voters] need to be concerned with,” Walz told Taff. “The…