Having recently enjoyed (?) a government shut-down over immigration issues, I decided to look for immigration-themed songs. Of course, there's only one way to begin!
I searched for more songs about the theme, but being a (legal) immigrant myself, I found it a depressing experience. There are many songs on the subject, but most are from very partisan perspectives, either pro- or anti-immigration (particularly illegal immigration). If I select any of them, I'm sure to offend some readers while pleasing others. Therefore, I point you to the selection available on YouTube, and invite you to choose those that suit you.