The mainstream corporate media’s mansplaining of Vice President Kamala Harris has begun. First out of the starting gate: 60 Minutes Correspondent Bill Whitaker, whose prime-time interview with the Democratic Party’s presidential nominee set the pace of the pile-on to come. During their 20-minute discussion, Whitaker interrupted Harris eight times, questioned her ability to deploy her personal firearm, and inserted his decades of immigration reporting experience into her explanation of the Biden-Harris Administration’s immigration record, including its full-throated support of a comprehensive i…