Peter attempts to prove how much he loves American by stopping immigration.
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Family Guy Season 6 Episode 6 Quotes

Lois: Peter, why are you wearing that suit?
Stewie: Yes, you look like the statue of liberty's pimp.
(Stewie and Brian share a High-five)

Carter: What's going on here?
Peter: We're taking what's ours! Actually, we're taking what's yours, but we don't think you deserve it, so we're calling it ours and taking it!