Starbucks Workers United began striking on Nov. 13. Here's the latest and if the strike is impacting customers.

Starbucks Workers United is now referring to its walkout as "the longest unfair labor practice strike in Starbucks history."

Starbucks is facing a high-stakes test of its brand as a progressive employer, with Senator Bernie Sanders spotlighting a pay gap that puts nearly $96 million in compensation for the company's chief executive alongside thousands of workers still waiting for a first union contract.