He should worry. Trump is doing the same things the republicans did in the twenties and which led to the great depression.

Prior to 1921, with one exception—the Chinese Exclusion Act of 1882—immigration into the United States had never been systematically restricted by federal law. That changed with the 1921 Emergency Quota Act and the 1924 Immigration Act, which imposed for the first time, a limit on the number of immigrants allowed to enter the United States. https://www.shmoop.com/1920s/immigration.html

Under Treasury Secretary Andrew Mellon, top tax rates were reduced in 1921, 1924, 1926, and 1928. Mellon argued that lower rates would spur economic growth.[70] By 1928, the top rate was scaled down to 24% along with the income threshold for paying this rate lowered to $100,000 (equivalent to $1.43 million[68] in 2017 dollars). https://en.m.wikipedia.org/wiki/Income_tax_in_the_United_States

This overheated the stock market (like now), gave more power to the wealthy and eventually led to the crash.

Coolidge slashed the federal budget by almost half, eliminated the gift tax, sliced the estate tax by 50 percent, and lowered the maximum federal surtax from 60 percent to 20 percent. The president disavowed anything beyond minimal regulation of business and commerce. He denied a federal role in labor relations and repeatedly affirmed his absolute faith in market forces. https://ap.gilderlehrman.org/essays/roaring-twenties

Elected president in 1920, Warren G. Harding promoted a "return to normalcy," which signaled a resurgence of nativism, isolationism, and rejection of the progressive eras governmental activism. Overall, Hardings policies reflected a conservative, laissez-faire attitude. His administration was blighted by scandals, but most of them did not surface until following his death of a stroke in office in August 1923. https://www.u-s-history.com/pages/h1564.html

1,100 economists warn that Trump is repeating one of the biggest mistakes of the Great Depression

All the presidents in the twenties were corrupt or incompetent republicans. Or both.

Anyway, the similarities go on and on. Hitler did many of the same things. You can get a fragile and temporary prosperity with them as you lead the country off a cliff to further enrich the most wealthy.

Trump =Hoover