Diplomatic crises during the second Trump administration

Since 2025, the second Donald Trump administration of the United States has sought to annex Greenland, an autonomous territory of Denmark, triggering an ongoing international diplomatic crisis. This escalated in early 2026 after Trump refused to rule out the use of military force to annex Greenland and threatened a 25% import tax on goods from several European nations unless Denmark ceded Greenland. Trump's statements sparked a confrontation with Denmark and the EU, reigniting earlier concerns of a US–EU trade war. On 21 January, Trump reversed his position at the 2026 Davos conference, pledging not to use force or tariffs to annex Greenland.

Shipping traffic through the Strait of Hormuz, a major maritime choke point for world energy trade, has been largely blocked by Iran since 28 February 2026, when the United States and Israel launched an air war against Iran and assassinated its supreme leader Ali Khamenei. In retaliation, Iran launched missile and drone attacks on Israel, US military bases, and US-allied Gulf states. The Iranian Revolutionary Guard (IRGC) issued warnings forbidding passage through the strait, has boarded and attacked merchant ships, and has laid sea mines in the strait. Since 13 April, the US has blockaded Iranian ports, leading to a "dual blockade" of the strait. Until the US–Israeli war against Iran, the Strait of Hormuz was open and about 25% of the world's seaborne oil trade and 20% of the world's liquefied natural gas (LNG) passed through it.

bilateral meeting between USA and Ukraine on February 28, 2025

2025–2026 US military anti-drug trafficking operation

trade war between the United States, Canada, and Mexico

2025 proposal by Donald Trump

political and economic crisis in Cuba

period of heightened tensions between Iran and the United States

February 2025 speech by Vice President JD Vance

new or increased tariffs announced by Trump on 02.04.2025

proposed expansion of the U.S. by Donald Trump

proposed military intervention plan by US President Donald Trump

meeting between the presidents of South Africa and the U.S