The Senate on Thursday overturned a mining moratorium in Minnesota's Superior National Forest , a boon for a Chilean mining company subsidiary and a stinging loss for environmentalists trying to protect the Boundary Waters Canoe Area Wilderness. The chamber voted 50-49 to overturn a protection imposed by President Joe Biden in 2023 that he set for 20 years. It clears the way for a long-stalled mine project proposed by Twin Metals Minnesota to restart plans to access the immense stores of copper