The United States has reactivated sanctions against Iran that could trigger the collapse of the multilateral Iran nuclear deal.

If Tesla goes private with significant funding from Saudi Arabia or other foreign investors, it would raise national security and ethical questions.  

President Trump has targeted Germany over its supposed dependence on Russian natural gas, and the proposed Nord Stream 2 is dividing the EU. What’s in store for Europe’s pipeline politics?

President Trump’s revocation of a former CIA director's security clearance has stirred up a debate about access to government secrets, free speech, and democratic norms.  

Despite the sharp exchanges between the U.S. and Iranian presidents at the United Nations, new negotiations may not be so far-fetched as sanctions intensify against Tehran.