This legislation was promoted by President Thomas Jefferson, who called for its enactment in his 1806 State of the Union Address. He had promoted the idea since the 1770s. It reflected the force of the general trend toward abolishing the international slave trade which Virginia, followed by all the other states, had prohibited or restricted since then. South Carolina, however, had reopened its trade. Congress first regulated against the trade in the Slave Trade Act of 1794. The 1794 Act ended the legality of American ships participating in the trade. The 1807 law did not change that—it made all importation from abroad, even on foreign ships, a federal crime.