Populism is Tommy Douglas campaigning for universal health care in the face of the doctors' strike.  It is a million women in pink kitten hats marching against misogyny.
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The Oil-driven astro-turf nonsense is demagoguery and fear mongering.  It is fully funded rent-a-crowd, and big-data manipulation game playing.
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One is about social justice.
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The other is about using chicanery, fear and prejudice to achieve evil.
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There is a huge difference..