President Trump’s social media sniping at Amazon comes as federal agencies consider steering billions of dollars to the retail and cloud-services giant, and critics hope Trump’s fury prompts bureaucrats to hit the brakes.

At the Pentagon, a single-vendor cloud computing contract is about to be open for bids. Competitors fear the contract, which could be worth $10 billion over 10 years, is structured in a way that makes Amazon Web Services the front-runner.