Donald Trump suggested Wednesday that Vice President Kamala Harris had decided to “turn Black” for political gain, as he attacked his Democratic White House rival during a combative and inflammatory interaction with African American journalists in Chicago. The Republican former president’s provocation marked an escalation of the 78-year-old’s vitriol against Harris, whom he falsely accused of having identified as Indian but then, “all of a sudden, she made a turn, and she became a Black person.” Harris, who has long identified as Black and graduated from a historically Black university, “was a…