Republican Rep. Michael McCaul warned on Sunday that any U.S. military intervention to obtain Greenland would put America at odds with its NATO allies — and possibly spell the end of the alliance itself.
“What do you make of what’s going on with the president in Greenland? And now he’s slapped tariffs on eight of our allies in Europe; he’s not ruling out military force to get Greenland. What is going on?” ABC News’ “This Week” co-anchor Jonathan Karl asked McCaul, who serves as chair emeritus of both the House Foreign Affairs and Homeland Security committees.
While McCaul acknowledged the strategic importance of the autonomous island, which is part of the Kingdom of Denmark, he said that the U.S. already has a treaty that allows “full access” to protect Greenland — effectively negating the purpose of any invasion.
“The fact is, the president has full military access to Greenland to protect us from any threat,” McCaul said. “So if he wants to purchase Greenland, that’s one thing. But for him to militarily invade would turn Article Five of NATO on its very head and, in essence, press a war with NATO itself. It would end up abolishing NATO as we know it.”

Rep. Michael McCaul, R-Texas, appears on ABC News’ “This Week” on Jan. 18, 2026.
ABC News
McCaul added, “If we want to put more military in there, we can; we don’t have to invade it. If he wants to buy it, that’s fine. But I don’t see a willing seller right now.”
This is a developing story. Check back later for more updates.