'Haters gonna hate & deniers will deny': Alexandria Ocasio-Cortez defends Greta Thunberg after Steven Mnuchin dissed the activist

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· *Rep. Alexandria Ocasio-Cortez sprung to Greta Thunberg's defense after Treasury Secretary Steven Mnuchin said on Thursday the teenage activist should study economics before lecturing the US on climate change.*
· *"If you don't have an economics degree like Greta, they'll mock you for not having one," the Democratic...