Vice President Kamala Harris slapped back at former President Donald Trump during an impromptu talk with reporters on the tarmac Thursday. As she departed a plane, Harris accused Trump of trying to duck out of a presidential debate on Sept. 10 after President Joe Biden stepped down from his campaign and endorsed his running mate. “He agreed to that previously,” Harris told reporters, “Now it appears he is backpedaling.” Want more breaking political news? Click for the latest headlines at Raw Story. Earlier this week, Trump tried to ditch the ABC News-hosted debate, arguing it should be hosted …