A DOUBLE PORTRAIT by Amy Sherald set an astronomic new auction record Dec. 7 at Phillips New York. “Two Bathers” (2015) soared to $4,265,000 against a low-six figure estimate of $150,000-$200,000. The painting sold for about 20 times its high estimate with bidding ongoing for 15 minutes. “The Bathers” was the first lot in...