There were no such trade laws in place.

By 1850 over 50% of all of the value of US exports was raw cotton… mostly to England.

There were tariffs involved, the one that was most hated was the 1828 Tariff of Abominiations. But that tariff had been scaled back over the decades. The Tariff of 1842 saw really low tariff rates and with the Warehousing act it was basically an era of free trade.

In 1857 the tariff rates were set even lower. But after the Panic of 1857 calls for more protectionist tariffs happened. That was the Morrill tariff and that only passed because the South had left the Union.