As a subject for books, plays and films, Nixon, who died in 1994, remains ever fascinating. China, of course, has been ever on our minds. But the [John Adams] opera [Nixon in China] faded from the limelight, remaining on the fringes. Over the past two decades it has had the occasional small-scale production in Europe, along with a mounting by English National Opera in London of Sellars’ production, which proved a surprise hit. As far as Nixon’s homeland has been concerned, we’ve been stuck with the trivial, jokey production by James Robinson, first given by Opera Theater of St. Louis in 2004 and since making the rounds of several, mostly midsized, American companies, such as Opera Colorado, Chicago Opera Theatre and Portland Opera.