I'm not saying they should secure national borders. I'm saying the States should handle immigration to their respective states. They give out the licenses and other things needed to live in the state.
Americans can move freely between the States of the union. So I don't see a problem with someone immigrating from Minnesota to South Carolina if that is what they want to do.
Btw, Everyone has an opinion on the matter, but I think that the Federal government is in the best position to speak on the issue of immigration for people that would like to enter the USA.
