Hmm, I think that the USA has probably shifted rightward since the 1970s/1980s.
While "cosmopolitan" positions on same-sex marriage, reproduction rights and race are all en vogue right now, there's a building neol-liberal corporatism in both major parties. Opposition to trade restrictions, increases in the minimum wage and truly progressive taxation is much more prevalent now than it was 40 or 30 years ago.
This, the USA is shifting to being progressive on social and scientific issues, but I think that since the 1960s and 1970s there has been a clear trend to placing more trust in the leadership of corporations and business than government itself.
