Australia is “killing” the US aluminum market, a senior trade adviser to President Donald Trump said, in a potential blow to Prime Minister Anthony Albanese’s efforts to secure an exemption from tariffs that come into effect next month.

Peter Navarro has become a red flag for Australian negotiators trying to secure an exemption from the president’s tariffs on steel and aluminium.

U.S. President Donald Trump says he has agreed to consider a tariff exemption on Australian steel and aluminum imports after a telephone conversation with Australia’s prime minister.