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The Nike Air Jordan 1 is, in some ways, the iconic US shoe.

Shoes, one of the most basic necessities and also one of Americans' biggest splurges, could become more expensive, including the beloved sneakers Nike Air Force 1s and Adidas Sambas.

The risk of a trade war and the disruption of supply chains have landed a blow on American companies like Nike, Apple and Gap, which dropped 11%, 9% and 20% respectively.

For instance, American businesses including technology giants Apple and Intel, and sportswear giant Nike have large factories in Vietnam.

The team strode into the arena wearing black shirts with her signature bun peeking out from a Nike swoosh.