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(Technically speaking we don't know that Reagan or Ollie North actively sought to harm black people but it is a matter of objective fact that they contributed significantly to the glut of cocaine on the market that led to the popularization of crack.)
Which is to say: crack would exist without Reagan. The crack epidemic might not have. Which is like... enough to make Reagan one of the worst presidents all by itself, even omitting his (numerous) other sins.
