Donald Trump could have vowed to work with General Motors to try and save some U.S. jobs, instead today it looks like he is going to war with the automaker. This comes a day after GM announced it was shutting down production at plants in Ohio and Michigan and discontinuing some car models. This afternoon Trump reacted on Twitter:

This came shortly after National Economic Council Director Larry Kudlow expressed his “disappointment” with the news from GM.

While Trump’s threat may have been empty, it was enough to send investors into a panic.

As many news outlets are pointing out, Trump’s tough talk may be his way of dealing with something that will be viewed as a failure for his administration.