When Leftists Say Make America Great Again is Racist Do They Mean It’s Immoral to Criticize Obama’s Performance?

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Unless you want to say that Obama’s presidency was a success, the U. S. greater than before thanks to his initiatives, then what’s wrong with president Trump saying let’s make America great again, is it the fact that Obama is half black and therefore to criticize his performance as president is racist, do thusly we now have affirmative action in presidential legacies?