The treaty that created NATO did not contemplate an attack by one ally on another. A seizure of Greenland by President Trump would test the endurance of the mutual-defense pact.
Top officials from the United States, Denmark and Greenland will meet at the White House for the first time since President Trump said he wanted to own Greenland.
President Trump gave a speech in Detroit that was supposed to focus on the economy, but it veered off-topic quickly and covered a lot of unrelated ground.
The White House called President Trump's reaction "appropriate" after video showed him responding to a heckler during a visit to a Michigan Ford plant.
President Trump said Tuesday that he's preparing to halt federal funding to sanctuary cities and states on February 1 — potentially yanking billions in revenue in response to laws barring cooperation with immigration agents.
Amid a deadly crackdown on protesters in Iran, President Trump continues to threaten military action against Tehran and warned countries that do business with Iran that he could impose a tariff.
Former President Bill Clinton and former Secretary of State Hillary Clinton said Tuesday that they will refuse to comply with a congressional subpoena to testify in a House committee's investigation of Jeffrey Epstein.
President Trump has threatened Iran amid a deadly crackdown on protesters. NPR's Leila Fadel speaks to Holly Dagres of the Washington Institute for Near East Policy about the protests.
