These consist of four laws passed by the Federalist Congress and signed by President Adams in 1798: the Naturalization Act, which increased the waiting period for an immigrant to become a citizen from 5 to 14 years; the Alien Act, which empowered the president to arrest and deport dangerous aliens; the Alien Enemy Act, which allowed for the arrest and deportation of citizens of countries at was with the US; and the Sedition Act, which made it illegal to publish defamatory statements about the federal government or its officials. The first 3 were enacted in response to the XYZ Affair, and were aimed at French and Irish immigrants, who were considered subversives. The Sedition Act was an attempt to stifle Democratic-Republican opposition, although only 25 people were ever arrested, and only 10 convicted, under the law. The Kentucky and Virginia Resolutions, which initiated the concept of "nullification" of federal laws were written in response to the Acts.