At the top of the list, Bellevue-based Expedia has filed a declaration in support of Attorney General Bob Ferguson's request to suspend the executive order.
"Never has our system of checks and balances been more important", Washington State governor Jay Inslee says.
Specifically, Bezos notes that Amazon is supporting the Washington state attorney general, who is suing Trump over his executive order.
"We'll continue to make our views on these issues known to leaders in Washington and elsewhere".
Amazon says it has 49 employees born in the seven Muslim-majority countries included in the ban who are legally working for the company in the United States or elsewhere.
It took Amazon a day to collect its response - even if it is a strong one - with Bezos dedicating Amazon's deep legal resources to fight Trump's refugee ban.
The complaint asserts that Trump's immigration order "is separating Washington families, harming thousands of Washington residents, damaging Washington's economy, hurting Washington-based companies, and undermining Washington's sovereign interest in remaining a welcoming place for immigrants and refugees". Those arguments are also being used in other lawsuits filed over the weekend on behalf of individuals detained at USA airports.
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The submissions by Expedia and Amazon in the lawsuit are focused on the impact of the order on their businesses and employees. "Changes to USA immigration policy that restrict the flow of people may inhibit these companies' ability to adequately staff their research and development efforts and recruit talent from overseas", it said.
Amazon is one of several tech giants that are opposing the order.
As of January 29-two days after the regulation was passed-at least 1,000 Expedia customers who hold passports issued by one of the seven impacted countries have purchased trips that involve flights to, from, or through the United States, according to Dzielak.
The order "imposes restraints on Expedia's ability to efficiently operate its business", he said.
"And we'd be happy to testify further if needed", a Microsoft representative told Reuters.
Amazon's chief Jeff Bezos, Larry Page of Alphabet, Facebook COO Sheryl Sandberg, Vice President Mike Pence and President Donald Trump attend a meeting at Trump Tower December 14, 2016 in NY. In an email to employees, Bezos announced that the company has reached out to top White House officials to register its objections and is trying to work with Congressional leaders from parties "to explore legislative options".