Saying Elon Musk was “essentially becoming a TRAIN WRECK,” President Donald Trump on Sunday expressed disappointment that his formerly loyal supporter has decided to form a political party.

“I am saddened to watch Elon Musk go completely ‘off the rails,’ essentially becoming a TRAIN WRECK over the past five weeks. He even wants to start a Third Political Party, despite the fact that they have never succeeded in the United States,” Trump said in a Truth Social post on Sunday.

Frustrated with Republicans for passing the megabill last week, Musk on Saturday announced the launch of the America Party, saying his own research indicated it would be eagerly supported by Americans.

“By a factor of 2 to 1, you want a new political party and you shall have it! When it comes to bankrupting our country with waste & graft, we live in a one-party system, not a democracy,” Musk wrote. “Today, the America Party is formed to give you back your freedom.”

Trump clearly didn’t agree with Musk on the need for another political party.

“The one thing Third Parties are good for is the creation of Complete and Total DISRUPTION & CHAOS,” Trump wrote in his Truth Social post, “and we have enough of that with the Radical Left Democrats, who have lost their confidence and their minds! Republicans, on the other hand, are a smooth running ‘machine,’ that just passed the biggest Bill of its kind in the History of our Country.”

Speaking later to reporters at an airport in New Jersey, Trump reiterated his theory that third parties just don’t work in the American system. “He can have fun with it, but I think it’s ridiculous,” Trump said.

Trump spent the lion’s share of his Truth Social message attributing Musk’s change of heart toward him to his own financial interests.

“It is a Great Bill but, unfortunately for Elon, it eliminates the ridiculous Electric Vehicle (EV) Mandate, which would have forced everyone to buy an Electric Car in a short period of time. I have been strongly opposed to that from the very beginning,” Trump said.

Trump, in June, had offered a similar complaint about Musk: “Elon was ‘wearing thin,’ I asked him to leave, I took away his EV Mandate that forced everyone to buy Electric Cars that nobody else wanted (that he knew for months I was going to do!), and he just went CRAZY!”

Musk, who was brought in to the Trump administration early on to improve the functioning of the federal government, has been arguing that the megabill, which Trump signed Friday, is a disaster.

“The latest Senate draft bill will destroy millions of jobs in America and cause immense strategic harm to our country! Utterly insane and destructive,” he wrote June 28 on X. “It gives handouts to industries of the past while severely damaging industries of the future.”

Two days later, he threatened to create his own party. “Our country needs an alternative to the Democrat-Republican uniparty so that the people actually have a VOICE,” he said.