BERLIN — Former president Barack Obama on Thursday took his successor to task for wanting to build a wall along the Mexican border, delivering a sharp attack while President Trump was a mere 500 miles away in Brussels.
"In this new world we live in, we can’t isolate ourselves — we can’t hide behind a wall,” Obama said before 70,000 cheering spectators at the iconic Brandenburg Gate, where he joined German Chancellor Angela Merkel to mark the 500th anniversary of the Protestant Reformation.
