On a slew of environmental issues, President Donald Trump and Democratic hopeful Joe Biden are opposites, from climate change to renewable energy.
But on one of Minnesota's most pressing environmental concerns, opening the state to copper-nickel mining, the division isn't quite as clear. Trump has boasted of opening up northern Minnesota to mining for minerals and copper. Meanwhile, Biden has been publicly mute on the subject.
Biden has not come out for or against either of the two controversial copper mines lined up for the state. His campaign did not respond to repeated requests to discuss the matter or even confirm that he has not taken a position.
The silence makes perfect sense, many stakeholders say, given the tightrope moderate Democrats walk between the DFL's distinct labor and environmental wings, particularly in Minnesota's northeast. And with Minnesota a key swing state in this presidential election — Trump narrowly lost it in 2016 — Democrats do not want to risk alienating voters in either camp. Nathaniel Rakich, elections analyst at Nate Silver's FiveThirtyEight political blog, calls the state "now one of the likeliest states to be the Electoral College tipping point."
Interpretations of Biden's silence on opening Minnesota to copper mining differ.
"If Biden is elected there will be no copper-nickel mining even though he's not saying anything about it," said Jennifer Carnahan, chairwoman of Minnesota's Republican Party. "We know where he stands. He was in Obama's administration for eight years."

The Trump administration has pushed copper-nickel mining just outside the Boundary Waters Canoe Area Wilderness, reversing key decisions by the Obama administration to block it as too risky for the fragile ecosystem.
Other stakeholders are reading tea leaves on what a Biden presidency means for the copper mining industry's advance in Minnesota.