President John Adams oversees the passage of the Naturalization Act, the first of four pieces of controversial legislation known together as the Alien and Sedition Acts, on June 18, 1798. Strong political opposition to these acts succeeded in undermining the Adams administration, helping Thomas Jefferson to win the presidency in 1800.
At the time, America was threatened by war with France, and Congress was attempting to pass laws that would give more authority to the federal government, and the president in particular, to deal with suspicious persons, especially foreign nationals. The Naturalization Act raised the requirements for aliens to apply for U.S. citizenship, requiring that immigrants reside in the U.S. for 14 years before becoming eligible. The earlier law had required only five years of residence before an application could be made.