Republican Senator John McCain has said that President Donald Trump's trade policies toward Mexico and the rest of the world could be counterproductive.
Treasury Secretary Steve Mnuchin also succeeds in getting a promise to combat climate change dropped.
President says he'll meet with Canadian PM Justin Trudeau and Mexico's Enrique Pena Nieto to talk security, immigration and trade.
Chinese president Xi Jinping says the country will 'open more' to the outside world; New Zealand PM says China will fill any void created by Trump.
Both Republicans and Democrats are deeply divided on trade this election, setting up convention showdowns over the language on trade in their party platforms.
Obama says Trans-Atlantic Trade and Investment Partnership will 'promote growth and create jobs.'
What does history tell us about the return of arguments between those who back protectionism and those who favor free trade?