"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.

President Donald Trump on Sunday called Elon Musk's plans to form a new political party "ridiculous," launching new barbs at the tech billionaire and saying the Musk ally he once named to lead NASA would have presented a conflict of interest given Musk's business interests in space.

President Donald Trump and Elon Musk are trading public insults after the Tesla billionaire suggested he'll create a new political party, "America Party."

Billionaire Elon Musk consults with Forward Party founder Andrew Yang on America Party plans, aiming to field candidates despite two-party system challenges