Paul Krugman, the Nobel Prize-winning economist turned liberal political pundit, praised Vice President Kamala Harris’ new economic platform in a column for The New York Times Monday — and tore down former President Donald Trump’s efforts to paint it as radical. He was reacting to Harris unveiling a sweeping plan intended to lower costs for American families — and after Trump responded by calling her a “communist” and giving his own rambling speech attacking Harris’ policies that left even Fox News commentators exasperated. “For one thing, Harris actually outlined her economic proposals, rathe…