The National Labor Relations Board is considering Amazon's objections to a union election that resulted in the first unionized Amazon warehouse in the U.S.

Warehouse workers at an Amazon fulfillment center on Staten Island have voted to join the upstart Amazon Labor Union, making it the first Amazon facility in the U.S. to unionize.

Amazon will face two union elections at once. Federal officials have set a union vote for Amazon workers at a Staten Island warehouse, coinciding with the ongoing re-do election in Bessemer, Ala.

Last year, Alabama workers voted against forming the first unionized Amazon warehouse in the U.S. Then, federal labor officials said Amazon unfairly influenced that election. Now, a re-vote begins.

Amazon workers in New York plan to take an initial step toward forming a union. Organizers say they have collected some 2,000 signatures for a union vote from warehouse workers on Staten Island.

Some 2,000 workers from four facilities have signed cards seeking an election to form a union, according to organizers.