“The 2017 Whitney Biennial was organized in one era and exists in another. I leadingly asked the show’s two 30-something Asian-American curators, Christopher Y. Lew and Mia Locks, if they altered anything after the election. Nodding with patient understanding but unshaken, both firmly said, “We didn’t change course.” By all rights then, this is the first, last, and only Hillary Clinton biennial. But that doesn’t mean it is out of step, nice-y nice, disconnected, or just so many snowflakes from another era. Instead and pressingly, even with wild up and downs, flaws and all, the 2017 Whitney Biennial is the best of its kind in some time.