Normally we take a break on Saturday to review the best of the past week's coverage, but Donald Trump's roller coaster of a first week in office has made it impossible for the newsroom to relax right now. So today we're bringing you new stories about the US and Mexico, as the two neighbours feud about a proposed border wall, import tariffs and renegotiating NAFTA.

Much of this cross-border political debate has unfolded not behind closed doors, between diplomats, but rather on Twitter, via the personal accounts of presidents Donald Trump and Enrique Peña Nieto. Or as Luis Gomez Romero puts it: welcome to the era of Twitter diplomacy. It may very well lead to a severe international crisis.

But Mexico's unpopular president is wise to keep standing strong against US aggression, writes Salvador Vazquez del Mercado. Peña Nieto's approval ratings have dropped to nearly single digits, in part thanks to an early rapprochement with Trump. Now, sticking up to the wildly disliked US president offers a surefire way to rally the Mexican people behind him.