They won't continue to import at the same levels. That's the point. They will switch import partners, use alternate products, produce internally, or go without. Supplies of pork back up here, the price goes down and the hogs farmer's revenue falls off a cliff. That's what they did with soybeans. They now buy somewhere else.
Tariffs were the original form of funding for our Federal Government.
Yes, back when we had no income tax and the cost to run the country was microscopic. If the country wants to repeal the income tax, can the IRS, cut the government in half and fund the remaining operations with a blanket 2% tariff on all imports, sign me up!
So the farmers cut back some on soybean production (still grow a lot) and increased the more profitable corn production. That's how farming works. You grow what is selling - you fill where there is a demand. That is, of course, unless the government further manipulates the market by paying subsidies to plant/grow what isn't needed - or to not plant at all (as has happened in the past).