The statements made by the Trump administration, along with the president’s use of executive actions to circumvent Congress on things such as tariffs, have caused economic experts and lawmakers to insist that Capitol Hill use its Article 1 powers in the Constitution to regain control over installing trade policies abroad.

“The President’s approach to Greenland is only the latest reason that the Congress urgently should reclaim its Article I powers to levy tariffs,” Jason Furman, who served as former U.S. chairman of the Council of Economic Advisers under the Obama administration, told the Washington Examiner. “I am hopeful that the Supreme Court will constrain the use of IEEPA for tariffs, but that is just one legal authority. The economy and our country more broadly would be well served if there were not this one dramatic exception to the general rule that fiscal policy, including tax rates, are set based on laws based by 535 people, not the whims of one person.”

Daniel Hannan, a conservative member of the House of Lords in the United Kingdom, said in a post on X that Congress could “stop this madness tomorrow” and regain its power to “cancel the tariffs,” which world leaders have already expressed to Trump as a “mistake.”

“It could bring impeachment proceedings on the impeccable grounds that the president has plainly lost his mind,” Hannan said. “No one who is compos mentis writes as he just did to the Norwegian leader.”

The letter of reference is one sent by Trump to Norwegian Prime Minister Jonas Gahr Støre, essentially saying his ambitions to take Greenland stem from his not receiving the Nobel Peace Prize last year.

Impeachment is not only being weighed by politicos outside of the U.S. Rep. Don Bacon (R-NE) told the Omaha World-Herald that he would “lean” toward impeachment if the Trump administration authorized an invasion of Greenland.

“It’s ridiculous that this has to even be done,” Bacon said. “But when the president talks about taking Greenland one way or the other way every day this last week or so, and that it’s unacceptable if Greenland refuses to be part of the United States, I felt like I needed to make a statement that Republicans disagree.”

On Capitol Hill on Thursday, Bacon said the president’s calls to take Greenland are “about the dumbest thing I’ve heard.” 

“I’ve gotta be candid with you: it’s such — attacking an ally,” he said. “And I don’t think he’s going to do it, I think it’s negotiating. However, don’t negotiate with our allies with threats of force. They’re our friends, and we’ve been there since World War II. … I think it would be the end of his presidency.” 

Sen. Ed Markey (D-MA) called to “invoke the 25th Amendment” to remove Trump from office over his message to the Norwegian prime minister. It has been used temporarily only four times in history, when presidents underwent medical procedures.

House Speaker Mike Johnson (R-LA) has taken a muted stance on Greenland, telling BBC News in a sit-down interview on Sunday that he “doesn’t foresee military intervention” by the U.S. and “diplomatic channels are the way to go.”

“It’s not our land, but Greenland has strategic importance to us,” Johnson said.

Republican strategist Dennis Lennox said in an op-ed for the Washington Examiner that the Greenland “fantasy” is harming the GOP and future negotiations with world leaders.

“Credibility once lost is not easily restored. The next Republican president will not be starting from a position of trust. Instead, he will be greeted with folded arms and raised eyebrows,” he wrote. “Who abroad is going to take Republicans seriously again when they talk about alliances, shared values, or long-term commitments? Why should anyone believe them?”

A bipartisan coalition of lawmakers went to Denmark this weekend to assure its leaders that not everyone in Congress is on board with Trump’s rhetoric. Of the 10, two were Republicans: Sens. Thom Tillis (R-NC) and Lisa Murkowski (R-AK), who have both frequently pushed back against the Trump administration.

“I’m going to remind them that we have coequal branches of government and I believe that there [is a] sufficient number of members, whether they speak up or not, that are concerned with this,” Tillis said, according to the Hill. “The actual execution of anything that would involve a taking of a sovereign territory that is part of a sovereign nation, I think would be met with pretty substantial opposition in Congress.”

Sen. Rand Paul (R-KY), another frequent Trump opponent, said on NBC News’s Meet the Press on Sunday that the acquisition of Greenland has little Republican support, adding that even the “most hawkish members of our caucus have said they won’t support that.”

Since Trump entered his second term, Congress’s power has weakened exponentially, with much of the House’s legislative schedule dictated by what the White House says. Trump has said we “don’t need anything more from Congress” after the One Big Beautiful Bill Act, and he’s sidestepped congressional authority through executive orders on economic and military matters.

Some Republicans have expressed concerns about Trump taking unilateral moves without permission from Congress, with the Senate attempting to pass a war powers resolution to rein in the president’s ability to conduct military operations in Venezuela. Vice President JD Vance cast the tiebreaking vote last week to defeat the resolution, but Democrats have teased future votes on Trump’s war powers on Greenland, which is a member of NATO.

The House has been less willing to rebuke Trump, with the chamber failing to override two vetoes from the president on bipartisan and largely unanimous bills. Bacon, who has voted in favor of Democrats’ war powers resolutions in the past, said the subject of one did not come up in the Venezuela briefing, but noted he left early. He said he would be “inclined to support one.”

“I support the administration, but I think we should protect Article One authorities,” he said.

Republicans are starting to take a step toward fighting back against Trump administration policies, most recently over the administration’s decision to allow artificial intelligence chips to go to China. Trump gave Nvidia the green light last week to sell its second-most powerful AI chips in China, but lawmakers and former officials have argued that it would damage America’s lead in the AI race.

EUROPE STANDS ‘UNITED’ BEHIND GREENLAND AS IT READIES RESPONSE TO TRUMP TARIFF THREAT

In a post to X, House Foreign Affairs Committee Chairman Brian Mast (R-FL) said Nvidia CEO Jensen Huang and his “paid minions are fighting to sell millions of advanced AI chips to Chinese military companies like Alibaba and Tencent. I’m trying to stop that from happening.”

Rep. Michael McCaul (R-TX), the former chairman of the Foreign Affairs Committee, told Reuters that China steals “so much intellectual property from this country, but we don’t have to sell it to them.”