(Reuters) -Amazon.com filed a lawsuit on Thursday accusing a U.S. labor board of illegally interfering in a union election at a New York City warehouse and claiming the agency's structure violates the U.S. Constitution.

The lawsuit in San Antonio, Texas, federal court seeks to block the National Labor Relations Board from deciding a case seeking to force Amazon ( AMZN ) to bargain with the union after it won the 2022 election at the warehouse in Staten Island.

The labor board last week upheld the results of the election, rejecting Amazon's ( AMZN ) claims that it was tainted by the conduct of workers, union organizers, and board officials who oversee voting.

Amazon's ( AMZN ) lawsuit says the board's in-house enforcement proceedings violate the constitutional separation of powers and the company's right to a jury trial. Several other companies including rocket maker SpaceX, Starbucks and Trader Joe's have made similar claims against the board in lawsuits and administrative cases.