What were some of the mainstream political actions against immigrants that the kkk sought to influence?

During the time of great industrial growth from the latter part of the 1800's to pre-WWI, millions of immigrants helped bolster the labor needs of the this time of growth and expansion in the United States. Peaking post WWI, the KKK supported a "Nativism" mindset in America and was resurrected during this era to influence others to restrict immigration. Nativism was a political policy of preserving or reviving indigenous cultures. The KKK sought to influence this policy.