Since the 1940s, Congress has largely let the president make decisions, while members of the House and Senate endorse or condemn those actions from the sidelines.
Why the US decision to withdraw troops from northern Syria is so dangerous.
Data show that the US intervenes more in other countries' affairs than it did in the past. It also currently hires fewer career professionals for ambassadorial or foreign affairs positions.
The US has historically asked for international support when brewing conflicts in the Middle East boiled over.
As US national security advisor, John Bolton was too much of a warmonger for Donald Trump.
Political leaders are ignoring dangerous threats to American national sovereignty, security and citizens' peace of mind.
After Brexit, the UK will need to decide whether it supports EU diplomacy or US militarism.
Donald Trump stepped back from launching US airstrikes inside Iran, but the conflict is unabated and there appears to be no way out of confrontation for now.
Both Iran and the US say they are not seeking a war, but it could happen by default.
Traveling death squads. Sadistic torture techniques. Stolen babies. The US helped it all happen by aiding Argentina's military regime in the 1970s, according to newly declassified documents.
A terrorism expert exposes the quirks, inconsistencies and foreign policy strategy behind the State Department's terrorist watchlist.
North Korea is a major military threat to the US and its Asian allies, but exactly how powerful are its nuclear weapons? An earth scientist explains why it's hard to answer this question.
The Trump administration has declared the most severe new sanctions against Cuba since President John F. Kennedy imposed an economic embargo banning all trade with the communist island in 1962.
As rival factions vie for control over Venezuela, many of the country’s 31 million people are suffering prolonged power outages, food and water shortages, and limited access to medicine.
A full 70% of the American public agreed that the US should maintain an active footprint across the globe.
The US president's tweet declaring the US would recognise Israeli sovereignty over the Syrian territory was unexpected and will do nothing for regional stability.
History shows that diplomacy takes time and many incremental steps forward, a diplomacy expert writes.
Food and medical aid at Venezuela's borders could spark a revolution.
Relying only on sanctions against North Korea may not be a productive way to get the country to give up its nuclear arms. Offering relief and aid may be more effective.
A Cold War era treaty helped dismantle more than 2,500 missiles between the US and Russia.