Gap, Aritzia and Urban Outfitters are among apparel retailers that should see margins expand, with the US' global tariff set at 15% -- vs. an average 20% for the sector -- after the Supreme Court struck down President Donald Trump's sweeping levies. Trump revised the blanket rate less than a day after announcing a 10% level, and is expected to pursue higher tariffs on China under Section 301. Bloomberg's Mary Ross Gilbert joins to discuss her research on the retailer sector and how tariffs are e...