Costco Wholesale has filed a lawsuit against the federal government over tariffs imposed under President Donald Trump’s administration, claiming the import duties were unlawfully applied and seeking to protect its right to a refund if the U.S. Supreme Court ultimately overturns them.

The lawsuit comes from a company whose large scale and loyal customer base have generated significant sales and profits, despite operating far fewer stores than traditional grocery chains.

In Arizona, Costco operates 19 warehouse locations, according to the company's website . That footprint is relatively small compared with traditional grocery chains in the state, such as Fry’s Food Stores, a Kroger subsidiary that operates well over 100 supermarkets across Arizona.

But Costco’s smaller store count does

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