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Donald Trump’s presidential campaign effectively bucked what the political scientists Donald Kinder and Lynn Sanders adroitly termed the Republican Party’s electoral temptation of race — using implicit racial appeals to win over racially conservative voters without appearing overtly racist. Trump’s play instead was to make several explicitly hostile statements about minority groups. Trump has been willing to go where most Republican presidential candidates haven’t. That might have made anti-minority sentiments a more potent force in the 2016 GOP primaries than in primaries past. That’s plausible, because campaign appeals…