Jessica Goldman Srebnick was standing in front of a cartoon image of Donald Trump urinating on the Constitution, biting her lip with mild concern. It was just days before Art Basel Miami Beach in 2017, and Srebnick, looking both breezy and statuesque in a sundress and sandals, was assessing this particularly provocative panel of a large mural by Lady Pink. The street art pioneer was one of the 12 artists Srebnick commissioned to create something new to coincide with the fair at Wynwood Walls, the outdoor art park that she owns and has cultivated into one of the most Instagrammable spots on earth...