The CEO of a large proposed gold and copper mine in Alaska’s Bristol Bay is denying reports that prominent conservative opposition to the project, including from Donald Trump Jr., has turned the White House against the project.

In a letter made public Monday, the Army Corps of Engineers asked the developers of the proposed Pebble Mine to take additional measures to compensate for the effects the mine will have on wetlands and streams before it can be permitted. The move could push a final decision on the mine until after the election. Democratic nominee Joe Biden has said he would halt the project.

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