Trump threatens to end NAFTA agreement via Twitter

US President Donald Trump tweeted yesterday expressed that he wasn't pleased with the NAFTA renegotiation process. Trump said: " We are in the NAFTA (worst trade deal ever made) renegotiation process with Mexico & Canada. Both being very difficult, may have to terminate?"
On the Mexican side, the response was that it would not negotiate through social media, but both Canada and Mexico rejected US demands.
Trump said he may withdraw from the NAFTA agreement, but legally it is unclear if the president can withdraw from an agreement without congressional approval. Trump is heading to Texas to look into the situation after Harvey hurricane, who has stopped oil production in the state.