President Trump's 'America First' message takes shape, as the rest of the world begins to digest what it might mean for them and global trade.

By Echo Wang, Marwa Rashad and Trevor Hunnicutt DAVOS, Switzerland (Reuters) -U.S. President Donald Trump demanded OPEC lower oil prices and the world drop interest rates in a speech to global business and political leaders and warned them they will face tariffs if they make their products anywhere but the U.