Lyric discussion by SusanBassPlayer 

If you read John Steinbeck's "Grapes of Wrath" you'll get the connection. As I recall there's a scene in the book when the Joad family tries to enter California. As they are approaching the State Line, the CA state police have set up a barricade (like a border crossing) because they are trying to limit the number of Okies and other migrant workers entering the state.

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