That is partly incorrect. Two Democrats since World War II have won a majority of white voters: Truman in 1948, and Johnson in 1964. Those were by small majorities of less than 1% with Johnson winning that group by less than 0.4% in the latter. The closing of the gold window by Nixon in 1971 created the conditions necessary for neoliberalism to take hold, and the neoliberal policies that were adopted between 1971 and 2006 created the financial crisis in 2007-09 that created the conditions necessary for right-wing commercial communism (which is more like fascism than communism) to take hold in America.