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.
The US has 50 nuclear bombs stored in Turkey. As tensions rise between the two countries, a look at how they got there and what might happen next.
After years of tensions over northern Syria, the US and Turkey have agreed to establish safe zones. Why now?
The disappearance and alleged murder of Saudi journalist Jamal Khashoggi is worsening relations between US allies Turkey and Saudi Arabia. An expert on the region believes there may be a way out.