US President Donald Trump has reignited discussions about withdrawing from NATO, particularly in light of European allies' reluctance to support US military operations in the Strait of Hormuz during the ongoing Iran conflict. While the North Atlantic Treaty Organization (NATO) allows for withdrawal under Article 13, it mandates a one-year notice to the United States and requires congressional approval. In 2023, Congress passed a law stating that a president cannot unilaterally withdraw from NATO without either a two-thirds Senate vote or an act of Congress. This legislation was co-sponsored by then-Senator Marco Rubio and Democratic Senator Tim Kaine. Senator Thom Tillis, a Republican, emphasized that the president cannot simply withdraw from NATO and warned of the risks involved. Legal experts note that any unilateral withdrawal attempt could lead to court challenges, highlighting the complexities surrounding presidential authority in treaty matters. Ultimately, while Trump may express intentions to exit NATO, significant legal and political barriers exist, making such a move highly uncertain and fraught with implications for international alliances.