US: A nation of immigrants, but ambivalent about immigration

America’s self-image is forever intertwined with the melting pot. It’s a nation that welcomes the world’s wretched refuse, a nation built by immigrants, a nation whose very motto is “E Pluribus Unum” – Out of Many, One.
America’s history also is replete with efforts to shut the golden door to arrivals from China, from Eastern and Southern Europe – and most recently, from predominantly Muslim nations.
America’s relationship with immigration is … complicated.