Fox News correspondent Lucas Tomlinson reports on new details on why President Donald Trump wants control of Greenland on ‘Special Report.’

For more than a generation, American presidents talked about leadership while quietly surrendering leverage, sovereignty and deterrence. President Donald Trump is doing something different — and the foreign-policy establishment is still struggling to catch up.

Call it the Donroe Doctrine: a modern, hard-edged update of the Monroe Doctrine in which American power is unapologetically asserted, adversaries are confronted rather than managed and allies are expected to defend themselves. Since re-entering office, Trump has struck Iran’s nuclear infrastructure, forced NATO allies to rearm, challenged China’s ambitions in the Indo-Pacific and reasserted U.S. dominance in the Western Hemisphere, from Greenland to Venezuela.

To critics, these moves look erratic. Read alongside Trump’s 2025 National Security Strategy (NSS) and the newly released 2026 National Defense Strategy (NDS), however, they reveal something else entirely: a doctrine grounded in hard realism, national sovereignty and old-fashioned power politics. The Donroe Doctrine is not improvisation. It reflects deliberate choices.

America First, redefined

IRAN STRIKES COULD SIGNAL LIMITS OF BEIJING, MOSCOW’S POWER AS US FLEXES STRENGTH

A B-21 took flight near Edwards Air Force base in September 2025. (Air Force )

The Donroe Doctrine begins with a rejection of the post–Cold War assumption that America must solve every global problem to remain secure. The 2025 NSS warns that previous administrations expanded the definition of U.S. national interest so broadly that "to focus on everything is to focus on nothing," arguing instead for a hard narrowing of what truly matters.

Under this approach, national security is defined narrowly and deliberately: defending the homeland, securing borders, protecting the economy and preserving U.S. sovereignty. This helps explain why Trump treats border security as........

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