Leaders including Merkel and Abe take to main Davos stage By PAN PYLAS and JAMEY KEATEN, Associated Press DAVOS, Switzerland (AP) — Several high-profile leaders, including Japanese Prime Minister Shinzo Abe and German Chancellor Angela Merkel, will address the World Economic Forum on Wednesday amid a wider debate of the merits of populist nationalism versus global cooperation. Abe and Merkel, who lead