Amazon narrowly led in an effort to prevent unionization in Alabama, according to preliminary results Thursday, but the e-commerce behemoth trailed in a partial tally in a parallel election in New York.

The results were not final in either case. At stake is Amazon's ability to remain union-free in its home market, a status it has guarded fiercely since the company was founded in the 1990s.

"We already made history. We defeated a lot of odds to get here," said Christian Smalls, a leader of the New York campaign who said he was not surprised by the union's early lead of more than 360 votes.

In the Alabama election, a re-vote after federal officials threw out results of a 2021 referendum, 993 workers voted against the labor group, compared with 875 employees in favor.

Workers walk to cast their votes over whether or not to unionize, outside an Amazon warehouse in Staten Island on March 25, 2022
Workers walk to cast their votes over whether or not to unionize, outside an Amazon warehouse in Staten Island on March 25, 2022 AFP / Ed JONES

But there were 416 "challenged" ballots, a "determinative" amount, according to the National Labor Relations Board, meaning the number of ballots still to be settled is big enough to potentially decide the final result.

The fate of the challenged ballots will be settled following an NLRB hearing that is not expected for at least a couple of weeks.

Stuart Appelbaum, president of the Retail, Wholesale and Department Store Union (RWDSU), said workers "will have to wait just a little bit longer," on Twitter.

"Every vote must be counted, and every objection heard," he said.

Amazon Labor Union members gather at a watch event as votes are counted, in Brooklyn, New York on March 31, 2022
Amazon Labor Union members gather at a watch event as votes are counted, in Brooklyn, New York on March 31, 2022 AFP / Ed JONES

In New York, union backers had reason for hope as ballots were counted from the Staten Island JFK8 warehouse, where more of the facility's 5,000 workers turned out compared with Bessemer, which has 6,000 employees.

When the New York count wrapped up for the day early Thursday evening, there were 1,518 workers voting in favor of the union, compared with 1,154 employees voting no.

"It's very clear that we'll finish tomorrow," an NLRB official said shortly before the counting stopped for the day.

At a news conference Thursday, Applebaum noted that their initial campaign last year -- which received lots of media coverage and even an official endorsement by President Joe Biden -- helped spur similar moves around the country.

"We ignited a movement with this campaign," said the RWDSU president.

He added that he was "honored" the Alabama campaign was cited by leaders of a successful Starbucks union drive last December in New York -- the first for the large coffee chain.

Since then, employees in over 150 Starbucks have requested union votes.

While the outcome of the latest votes remain uncertain, labor advocates hope they represent an inflection point as the overall rate of US private-sector unionization edges lower and unions remain on the outs in several states, especially in the South and West.