The Pentagon awarded the cloud computing project to Microsoft in October. Amazon later sued, arguing that Trump’s interference and bias against the company harmed Amazon’s chances.
The project, known as Joint Enterprise Defence Infrastructure or JEDI, will store and process vast amounts of classified data.
It will allow the U.S. military to improve communications with soldiers on the battlefield and use artificial intelligence to speed up its war planning and fighting capabilities.
The Pentagon was preparing to announce its decision between finalists Amazon and Microsoft when Trump publicly waded into the fray in July.
Trump said then that other companies told him the contract “wasn’t competitively bid,” and he said the administration would “take a very long look.”
Oracle had also protested after it and IBM were eliminated from an earlier round of bidding.
Amazon is looking for more information about what happened before and after Trump ordered the review.
Amazon’s court filing cites an alleged comment that surfaced in a recent book that said Trump in 2018 privately told then-Defence Secretary Jim Mattis to “screw Amazon” out of the contract.
Trump has accused Amazon of not paying its fair share of taxes and of putting brick-and-mortar stores out of business.
The Justice Department said it does not comment on ongoing litigation.
A judge is expected to decide as early as this week on whether Microsoft can start working with the Pentagon on the cloud computing project.
Amazon has asked for work to be halted as its lawsuit proceeds.