Arizona tribal leaders reacted angrily after President Donald Trump said their opposition to a copper mine was un-American.

BHP and Rio Tinto want to mine one of the largest copper deposits in North America, if they can get a hoped-for transfer of federal forest land in Arizona.

A federal appellate court has put a temporary hold on development of a copper mine planned for the Superior area. The Ninth Circuit Court o ...

President Donald Trump took a strong stance on Tuesday on the ongoing Resolution Copper dispute, issuing pointed criticism of ...

Executives of two of the world’s biggest mining companies, BHP and Rio Tinto, have lobbied at the White House as part of ...

In a separate post, outgoing Rio Tinto CEO Jakob Stausholm said the miners outlined to Trump "the enormous potential of this project to provide domestic copper and other critical minerals for decades ...