Met Gala Mystery: How Much, or Little, Will Lauren Sánchez Reveal?

Come Monday night, will Lauren Sánchez go overtly demure, or all out for flesh-showcasing attention at the Met Gala? How is Anna Wintour masterminding the final look? The questions are fascinating fashion-watchers because of the headlines around a White House State Dinner in April, where Sánchez turned heads in a low-cut ruby red corset dress with sheer detailing from Rasario, an independent brand established in 2012 by designer Rasida Lakoba.

Once...