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

President Trump has struck a new NAFTA deal with Mexico, but with severe disagreements remaining between the U.S. and Canada, his approach to trade negotiations is about to get its biggest test yet.

Brazil’s general election will be one of the biggest tests of its democracy in decades. Here’s a rundown of the candidates and issues to watch.

A recent study by noted climate scientists is particularly bad news for the planet’s most vulnerable regions, including the Arctic and small Pacific islands. 

Italy’s populist government has relished defying the European Union, and its latest showdown with Brussels could threaten the continent’s fragile recovery—and the global economy.