Trump's tweets keep US manufacturers on their toes

Criticism of Ford, GM and others raises prospect of elements of US industrial strategy being formulated on social mediaDonald Trump’s prolific and opinionated tweeting helped him win the US election, and now he is using Twitter to persuade big business to bend to his agenda. There was further evidence this week that the incoming president’s unusual approach is paying off after Ford cancelled plans to open a new plant in Mexico. It came one month after a Trump-brokered agreement with