ALTHOUGH HIS invoice has no likelihood of turning into legislation, Jared Golden, a congressman from Maine, delivered an necessary message final month when he launched laws to impose a ten% tariff on all imports into America. It isn’t simply that Mr Golden is the writer of the primary formal try to act on Donald Trump’s proposal for a common tariff. It’s that Mr Golden is a Democrat. His invoice is a sign of how tariffs, lengthy seen as an out of date instrument of financial coverage, have gained respectability throughout a lot of the political spectrum in America.