He doesn't threaten anything, but use a threatening tone and let it be understood. In one of his many daily tweets on Twitter, the president of the United States, Donald Trump, took the mere none other than the number one giant of the US auto industry: General Motors.
“General Motors, which was once the giant of Detroit – writes The Donald – is now one of the smallest automakers there. They moved the big factories to China BEFORE I TOOK OFFICE. This was done despite the aid given by the United States for his rescue. Shouldn't they go back to America now?”