Trump did cripple the U.S.’s steel industry if I recall correctly.

His tarrif was a huge boon for the steel industry. But because it kicked off retaliation from China, it undermined major exporters such as Boeing and Caterpillar and the soybean and pork industries.

One subsequent consequence of the tariff was a move by Nippon Steel to acquire the largest US manufacturer, US Steel. This has been held up by the Biden administration, but Republican stacked courts seem favorable to the acquisition. We'll see how long Biden's stalling can last.

But I'm unaware of what he may have done to cripple domestic steel production. The industry has been in the shitter for some time, largely due to how over leveraged manufacturers became during ZIRP.

That's not a Trump problem, it's a problem with American executives running Bust Outs on critical domestic infrastructure.