Donald Trump has explained why he no longer wants the United States to remain part of NATO.

In an interview with the Telegraph, he described his stance as final, saying his relationship with NATO is “beyond reconsideration.” He added that he had never fully trusted the alliance, calling it weak and suggesting that even Vladimir Putin sees it the same way.

At the same time, Marco Rubio indicated that the US may reevaluate its role in NATO. Speaking to Fox News, he argued that the alliance risks becoming unbalanced if member countries expect US military protection but refuse to allow access to their bases when American interests are at stake. In that case, he questioned whether the partnership still makes sense.

Trump also linked his position to tensions over Greenland.

In a video shared online, he claimed the issue “started with Greenland,” expressing frustration that Denmark would not consider selling the territory. He ended his remarks abruptly, declining to elaborate further.

These statements have triggered strong reactions. Critics warn that weakening NATO—an alliance founded in 1949 to provide collective security among 32 nations—could destabilize global security. Supporters, however, argue that the US should only remain in alliances that clearly benefit its national interests, especially in terms of cooperation and strategic advantage.

Public opinion remains divided.

Some believe the US should not continue carrying the burden of defense if allies are unwilling to fully cooperate, while others caution that stepping back from NATO could lead to serious geopolitical risks. There are also voices pointing out that the US already has a military presence in Greenland, questioning the reasoning behind the dispute.

For now, it is uncertain whether the US will actually withdraw from NATO, but the debate reflects increasing tension over the alliance’s future and its value to the United States.