Jim Crow Laws were laws used to keep discrimination in the south during the 1800s. The laws consisted of bans on intermarriage, poll taxes for the African Americans who want to vote, and whoever could pay the taxes, they took the literacy tests, resulting in the lack of ability to vote for African Americans.
The KKK also caused problems for colored people. They often had lynching sessions and attacked the colored when they had the chance. They disbanded in 1882 for their violent ways, however they had reformed during the 1910s-20s, but they don't harm anyone anymore, rather, they take part in cross lightings.
Nativism was very popular in the late 1800s, it was mostly aimed at Chinese immigrants, because most of the immigrants at the time were Chinese, and they were blamed for taking all the jobs in the country. There was a law passed in 1882, which halted Chinese Immigration, and by 1887, only 10 chinese immigrants were allowed into the U.S. with proper documents. However, the law has been repealed due to the Magnuson Act, in 1943.