The Trump administration says its reviewing a deal to sell nuclear-powered submarines to Australia over concerns that the U.S. is not producing enough of its own.

The announcement puts the Australian Labor government under great pressure to make major concessions to the US as Prime Minister Anthony Albanese flies to Canada for the G-7 summit and a possible meeting with Trump.

Australia’s defense minister has dismissed concerns that a deal between the U.S., Australia and Britain to provide his country with nuclear-powered submarines could be in jeopardy, following a report that the Pentagon had ordered a review.