Final answer:
The Democratic-Republicans were the political party that opposed the Alien and Sedition Acts, viewing them as unconstitutional and an infringement on states' rights.
Step-by-step explanation:
The political party that did not support the Alien and Sedition Acts was the Democratic-Republicans.
The Alien and Sedition Acts were a series of laws passed in 1798 by the Federalist-controlled Congress and signed into law by President John Adams.
These acts included new powers to deport foreigners as well as making it harder for new immigrants to vote. In addition, they limited the freedom of the press.
Primarily, the Democratic-Republicans, led by Thomas Jefferson and James Madison, were opposed to the Acts, arguing that they were unconstitutional and that they infringed on states' rights.
The controversy highlighted the stark ideological divide between the Federalists, who valued a strong central government, and the Democratic-Republicans, who advocated for states' rights and a limited federal government.