COVER On version with stairs: Ralph Lauren Collection suiting jacket and skirt, prices upon request. Tiffany & Co. Schlumberger bracelet, $38,000. EDITOR’S LETTER Page 25 Oscar de la Renta dress, price upon request; oscardelarenta.com. Tiffany & Co. earrings, $8,800, and Tiffany & Co. Schlumberger bracelet, $38,000; tiffany.com. Manolo Blahnik pumps, $665; manoloblahnik.com. Ralph Lauren Collection suiting jacket and skirt, prices upon request; ralphlauren.com. Tiffany & Co. earrings, $8,800, and Tiffany & Co. Schlumberger bracelet, $38,000; tiffany.com. Sarah Flint pumps, $445; sarahflint.com. CONTENTS Page 34 On Biden: Ralph Lauren Collection suiting jacket and skirt, prices upon request. “Night Moves”: MM6 Maison Margiela gilet, price upon request. THE NECKLACE Page 54 Harry Winston Rainforest necklace from the Majestic Escapes collection, price upon request. THE DESIGNER DEBUT Page 56 Bottega Veneta Kalimero bag…