The Washington Post via Getty Images A U.S. Secret Service agent guards Ivanka Trump and Jared Kushner's rented home in Washington's Kalorama neighborhood on March 24, 2017.

Minnesota activists have gone to court challenging the Trump administration’s approval of a wilderness area ore mine to be operated by a billionaire Chilean who owns the mansion that Ivanka Trump rents in Washington.

A coalition of Minnesota businesses, environmental advocates and outdoor recreation groups asked for a summary judgment last month in their lawsuit against the Interior Department and Chilean copper conglomerate Antofagasta’s local subsidiary. The company plans an extensive sulfide-ore mine to extract copper and nickel in Minnesota’s Rainy River watershed, which drains into the protected 1.1 million-acre Boundary Waters wilderness area.

The lawsuit challenges the Trump administration’s reversal of an Obama-era decision blocking the mine and requiring an environmental impact study. Some of the mine would be on U.S. Forest Service land, and the lawsuit asks a federal judge to rule that the Trump administration wrongly reinstated mineral leases for the Antofagasta subsidiary, called Twin Metals Minnesota, the Minneapolis Star Tribune reported.

The nonprofit Save the Boundary Waters called the Trump decision a “big fat Christmas gift for a giant foreign mining corporation willing to do anything to exploit the watershed of Minnesota’s crown jewel wilderness.” The mining operation threatens to contaminate a key water source and destroy the area’s ecosystem, the environmental groups say.

Antofagasta is a family-owned company headed by Chilean businessman Andrónico Luksic, who bought a $5.5 million mansion in Washington shortly after Donald Trump won the presidency. Luksic now rents the mansion to the first daughter and husband Jared Kushner for $15,000 a month, The Wall Street Journal has reported.

Richard Painter, who was President George W. Bush’s chief ethics lawyer and is now a law professor at the University of Minnesota, accused the Trump administration of allowing Luksic to use the Boundary Waters area “as his toilet.”