Oil prices eased on Thursday after U.S. President Donald Trump repeated a pledge to raise U.S. oil production, unnerving traders a day after the country reported a much bigger-than-anticipated jump in crude stockpiles.

President Donald Trump’s push to tariff goods from Canada, Mexico and China included a change to how online purchases will be taxed when they enter the U.S.

US ecommerce company Amazon had sought to counter the threat posed by cheap Chinese suppliers by launching the “Haul” brand offering products for less than $20 with shipping times of between one and two weeks. Now it may be able to avoid a “race to the bottom”, analysts said.