A few of Joe Biden’s friends, including former Secretary of State John Kerry, are coming to Iowa to vouch for the 2020 Democratic presidential hopeful. The “We Know Joe” tour, which will kick off Tuesday in Sioux City, will include Biden surrogates who represent the former vice president’s diverse national base of support and tell Iowans why he is uniquely positioned to beat Donald Trump and repair the damage he has done. “As the first Americans to make their voices heard in the Democratic primary, Iowans take their responsibility to help select a nominee seriously,” said Jake Braun, Iowa state...