The total number of victims is estimated at about 22,000. The victims were
executed in the Katyn forest in Russia, the Kalinin and Kharkiv prisons, and
elsewhere. Of the total killed, about 8,000 were officers taken prisoner during
the 1939 Soviet invasion of Poland, another 6,000 were police officers, and
the rest were arrested Polish Intellegentsia who the Soviets considered to be
"intelligence agents, gendarmes, landowners, saboteurs, factory owners, lawyers,
officials and priests"
The answer is the first Amendment
The First Amendment (Amendment I) to the United States Constitution prevents the government from making laws which respect an establishment of religion, prohibit the free exercise of religion, or abridge the freedom of speech, the freedom of the press, the right to peaceably assemble, or the right to petition the government for redress of grievances.
A wave of immigration inspired nativist politicians to pass laws forcing immigrants to pass a literacy test, and to create a QUOTA SYSTEM.
In other words they were completely against immigrants.
B.
The Gibbons v. Odgen was a decision that ruled that Supreme Court could regulate interstate commerce.
