Take Back America?

I don’t get it. I’m tempted to call the good people at Abbey/Graham Appliance services and ask what they mean by the bumper sticker. I see them occasionally, and I’ve never really understood the meaning.

Are they trying to say that America is currently in possession of non-americans?

I live here, and probably do not subscribe to the same belief system they do, does that mean they are trying to take America away from me?

It’s a mystery!