These gains are more the result of accelerating economic activity across the board.
**********************************************************
The Trump imposed tariffs have made material needed for these products cheaper if bought here rather than imported. This means no matter what the state of the economy here whatever is produced here will be less expensive then it would have been without tariffs.
Your post is internally inconsistent.
A tax that distorts the market cannot make a product cheaper. That is the whole point of a tariff today it increases the price of both imports bearing the increased costs as the tariff raises foreign prices and exports because of it affect on the terms of trade and exchange rates.
Export prices are moved up by any increased domestic demand due from the tariffs as inflation at some point will raise its head.
Nor can a tariff make a domestic commodity less expensive, it is just the opposite for multiple reasons.
Tariffs are political weapons and have their costs.