Previously renounced U.S. citizenship, but has since become a citizen again.
No. The US will nto allow you to gain ctizenship after you renounce it. Once you renounce your status as a US citizen, you can never be one again.
Suppose Congress passes a law stating that you can. Is their a constitutional bar?
In that case you would probably count as a naturalized citizen.
Why? You are a citizen by birth, a "natural born citizen," you are currently a citizen, and you've been here for 14 years. I'm not seeing a constitutional bar.
You stopped being a natural born citizen the instant you renounced. If you regain your citizenship you would count as a citizen by the means you regained it.
The US takes renunciation very seriously. By doing so you sever all ties with the US.
