There is no reason to think from the information that you provided that it would be legal for you to work in the U.S. If you have an alien number, you can order your immigration file using the Freedom of Information Act.
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Contact an immigration lawyer for a consultation and it would be prudent to obtain a copy of your file from the immigration service.
Most importantly, i hope you didnt vote if you are not a US citizen1
You are welcome to use the link provided below.
No, you have no legal claims based on having a long-expired J-1 to be in the US. Also, it is illegal to say you are a US citizen when you are not - i.e. - having a voter's registration card. A social security card and number do not give you a legal immigration right to the US. If you are trying to return to the US, you might want to find a job in the US and be sponsored for a work visa.