There's not an armored ship is US inventory.
They use compartmentalization instead.
I’ve been on the LCS-3 Fort Worth. It’s a damned death trap! No way I’d want to be on that in combat! It’s as safe as a PT boat!
Do you know what the USS Nimitz’s armor consists of? I was stationed aboard the Nimitz and I think I remember some armor being talked about. Can you refresh me there?
CVNS have armor. Not like an old BB, but they do have armored decks and bulkheads.