"I am saddened to watch Elon Musk go completely "off the rails," essentially becoming a TRAIN WRECK over the past five weeks,' Trump wrote on social media.

Trump said third political parties "have never succeeded in the United States" because "the system seems not designed for them."

The president responded to Elon Musk, a former ally of Trump’s, announcing the creation of the America Party by calling Musk a “TRAIN WRECK.”