What ideology of the 1840s and 1850s heavily opposed the immigration of Catholics and Irish into the United States?

Nativism

What gift did 'my true love' give on the fifth day in the song 'Twelve Days of Christmas'? How many teeth does a typical adult human have? What is the largest living lizard? Jambalaya is a traditional rice dish originating from which U.S. state? What revolutionary producer is famous for working with artists like Amy Winehouse and Bruno Mars?