The Senate voted 50-49 on Thursday to send President Donald Trump a resolution lifting a 20-year mining moratorium near Minnesota's Boundary Waters Canoe Area Wilderness, a move that could reopen hundreds of thousands of acres in the Superior National Forest to copper, nickel, and cobalt development. Trump is expected to sign it.

The razor-thin margin reflected a chamber split almost perfectly along party lines. Every Senate Democrat opposed the measure. But two Republicans, Sens. Susan Collins of Maine and Thom Tillis of North Carolina, crossed over to join them. Sen. Josh Hawley of Missouri did not vote. The final count still gave Republicans enough to clear the resolution under the Congressional Review Act, which allows Congress to undo late-term regulations with a simple majority and bars any future administration from reimposing a "substantially similar" rule.

The House had already approved the resolution in January, so Thursday's vote sends the measure directly to the president's desk. Once signed, the Biden administration's ban on mining across roughly 225,504 acres, about 400 square miles, in the Superior National Forest will be permanently undone.

What Biden blocked, and why Republicans pushed back

In 2023, the Biden administration imposed the moratorium to protect the watershed feeding the Boundary Waters, a million-acre wilderness in northeastern Minnesota popular with canoeists, anglers, and outdoor recreationists. The ban effectively shut down Twin Metals Minnesota, a subsidiary of Chile-based Antofagasta Minerals, which had been pursuing a copper-nickel mining project in the area.

Republicans dismissed the moratorium as federal overreach that locked away domestic mineral resources at a time when the United States depends heavily on foreign supply chains for critical minerals. Rep. Pete Stauber of Minnesota, the House sponsor of the repeal, framed the stakes in blunt terms.

As Newsmax reported, Republicans argued the mining restrictions qualified for a Congressional Review Act repeal because the Biden administration never formally submitted the land order to Congress, a procedural lapse that opened the door once the Trump administration took office and the rule was belatedly entered into the Congressional Record.

That procedural argument drew sharp criticism from Democrats, who said the CRA was never intended to reach back and undo a years-old land-management decision. But the argument carried the day on the Senate floor.

Stauber: 'Trillions of dollars of critical minerals'

Stauber, whose northern Minnesota district includes the Boundary Waters region, cast the vote as a generational win for his constituents and for American mineral security. In a statement after the Senate vote, he said:

"Never again can any Democrat President or administration unilaterally ban mining in this vital portion of the Superior National Forest, killing jobs and locking away trillions of dollars of critical minerals essential to our way of life."

The Washington Times noted that Stauber also said the ban had "cost Minnesota jobs and put the country's mineral security at risk." The area's deposits of copper, nickel, and cobalt are considered strategically important as the U.S. competes with China for control of critical-mineral supply chains.

Close Senate votes have become a recurring feature of this Congress. Recent 50-49 clashes over Iran policy showed how a single defection can tip the outcome either way, and Thursday's mining vote was no different.

Democrats and environmentalists warn of lasting damage

Opponents of the repeal painted a very different picture. Minnesota Democratic Sen. Tina Smith, as AP News reported, drew a line between supporting mining in general and supporting every proposed mine in every location:

"You can support mining, but that does not mean you support every mine in every place."

Environmental groups have warned that copper-nickel mining near the Boundary Waters could contaminate the wilderness watershed with sulfuric acid drainage, threatening the pristine lakes and rivers that draw hundreds of thousands of visitors each year. Democrats also argued the vote sets a broader precedent for weakening public-land protections nationwide.

Still, lifting the moratorium does not mean shovels hit the ground tomorrow. Twin Metals would still need to secure federal permits and survive what could be years of environmental review and legal challenges before any mine operates. The resolution removes the blanket ban; it does not waive the permitting process.

The procedural maneuvering in this fight echoes other recent Senate battles where party leaders have had to count every vote. Majority Leader John Thune's recent struggles to line up Republican support on other measures underscore how thin the governing margin really is.

A broader push on energy and resources

The Boundary Waters vote did not happen in isolation. The Trump administration last week also moved to scale back rules governing the disposal of coal ash, signaling a wider effort to roll back environmental regulations that Republicans say hamper domestic energy production.

The Environmental Protection Agency proposed loosening groundwater monitoring and protection standards at some coal ash sites. The agency also proposed rolling back requirements that entire coal plant properties be cleaned up, limiting cleanup obligations to only the areas where ash was actually dumped. A separate provision would make it easier for coal ash to be reused for other purposes.

EPA Administrator Lee Zeldin described the coal ash proposal as reflecting the agency's "commitment to restoring American energy dominance, strengthening cooperative federalism, and accommodating unique circumstances at certain [coal] facilities."

Taken together, the mining resolution and the coal ash rollback represent a deliberate shift in federal resource policy, away from the Biden administration's preservation-first approach and toward what the Trump administration frames as energy independence and mineral security.

Democrats have fought these moves at every turn, but their recent string of narrow Senate losses suggests the minority lacks the votes to block the majority's resource agenda through floor action alone. Legal challenges remain the more likely avenue for opponents.

Collins and Tillis break ranks

The defections of Collins and Tillis deserve a closer look. Collins, who represents Maine, a state with its own outdoor-recreation economy and conservation constituencies, has long charted an independent course on environmental votes. Tillis's opposition was less expected but may reflect similar calculations about balancing resource development with conservation concerns in his home state.

Their crossover votes were not enough to sink the resolution, but they highlight the tension within the Republican conference between pro-development energy hawks and members representing states where outdoor recreation and tourism carry real economic weight.

That kind of intra-party friction has surfaced repeatedly in this Congress. Maine's upcoming Senate primary is already exposing fault lines over how Republicans should balance economic populism with establishment preferences, a dynamic that plays out differently on every vote.

What comes next

Once Trump signs the resolution, the 20-year moratorium disappears, and, thanks to the Congressional Review Act's anti-reinstatement clause, no future president can reimpose a substantially similar ban through executive action alone. Any future moratorium would require an act of Congress.

Twin Metals will still face a long road. Federal permitting, environmental impact studies, and almost certain litigation stand between Thursday's vote and an operating mine. But the legal foundation for the ban is gone.

For the people of northern Minnesota who watched their economic prospects get locked behind a bureaucratic fence in 2023, Thursday's vote was a straightforward question answered the right way: Does the federal government get to unilaterally wall off trillions of dollars in American resources, or do the people's elected representatives get a say?

The Senate said the representatives get a say. That used to be called self-government.