President Donald Trump arrived Tuesday in the Netherlands for a NATO summit, just days after he made the decision to launch strikes on Iranian nuclear sites and hours after he announced a ceasefire in the Israel-Iran conflict.

President Donald Trump cast doubt on Tuesday over the United States' commitment to defending its NATO partners, suggesting there were "numerous" definitions to the cornerstone of the alliance's mutual defence pact.

President Donald Trump has arrived in the Netherlands for NATO's annual meeting after injecting some uncertainty over whether the U.S. would abide by the mutual defense guarantees outlined in its treaty.