If a surgeon operates needlessly on a patient, it’s medical malpractice. If a policymaker, by the same measure, destroys value, endangers livelihoods, and lowers living standards, it’s economic malpractice.

President Trump is committing economic malpractice, and he seems to be the only one who doesn’t know it. Trump perpetrated an epic blunder on April 2, which he macabrely called “Liberation Day,” by announcing the most sweeping set of import taxes since Herbert Hoover signed the Smoot-Hawley Tariff Act into law in 1930. Smoot-Hawley helped make the Great Depression “great” by choking off trade and shrinking the world economy. Trump’s tariffs will have a similar effect.

Investors get it, which is why the S&P 500 stock index (^GSPC) plunged by a dizzying 11% in just two days following Trump’s tariff unveilings. Businesses and investors are now preparing for a sad new world of lower profits, higher inflation, rising unemployment, and worse. In the 10 weeks since Trump has been in office, the economy has lurched from a “soft landing” and record-high stock prices to the precipice of recession, all of it Trump’s doing.

Trump’s insouciance is comically terrifying. “The operation is over!” Trump posted on social media on April 3, as stocks were mid-plunge. “The patient lived, and is healing. The prognosis is that the patient will be far stronger, bigger, better and more resilient that ever before.” Trump’s “patient” is the US economy and the “operation” is his administering of tariffs.

The operation isn’t over, however, and the patient has only begun hemorrhaging. Experts offering second, third, and fourth opinions say the patient is getting worse, not better, and whoever performed the operation bungled it badly. To completely torture what was a dreadful metaphor to start with, the patient was poorly prepped for surgery and is now suffering even more needless harm as a result.

Trump, in short, decided to operate on an economy that didn’t need it. When Trump took office less than three months ago, the US economy was the strongest in the world and envied everywhere. The United States recovered from the 2020 COVID shock faster and in greater measure than any other advanced nation. Despite elevated inflation from 2022 to 2024, a “soft landing” was clearly underway, with inflation returning to normal levels while employment and growth held up.

The outlook is much bleaker since Trump got his hands on the patient. Economists across the board are slashing their outlooks for economic growth and raising their estimates for inflation and unemployment. Back in January, Goldman Sachs, as one example, expected GDP growth of 2.4% in 2025, with the unemployment rate at the end of the year around 4% and inflation close to normal at 2.4%. With Trump’s emergency intervention now underway, Goldman expects GDP growth below 1%, unemployment of 4.5%, and inflation of 3.5%.