If you were issued a social security card, then the answer should be yes.

Do I have file for another visa for from him before he can return? Can I apply for the fiancé visa if he is working in Saudi Ara

I agree with my colleagues answers. You might also consider waiting until he is done with his contract to start the paperwork.

I received 2 interview request for N400 , is that normal?

It is unusual, but I agree with my colleagues - go to the first appointment and hopefully they will explain their mistake.

How long must I wait to apply for US Citizenship?

When did you become a green card holder?

Will I be over staying if my visa expires by the end of this year and getting married next month?

It seems from the facts above you are eligible for a green card based on the marriage. Consult and hire an immigration attorney to help with the...

Unfortunately it is not likely that the government will expedite your case. The best way to make sure your fiancee arrives as soon as possible is...

I 129F was approved but fail to apply visa. Then, my relationship with my fiancee was broke. Can I file for new fiancee?

You might need a waiver due to multiple filings. Consult and hire an immigration attorney who can assist with the process. More info is needed to...

I-140 approved 5 years ago and company filed chapter 11 bankruptcy recently?

Your facts are too detailed for a short answer. Consult the attorney working on your case.

My H1b visa is valid but 194 expired in March and is currently in RFE status. How long can I stay in uS

As long as USCIS is reviewing your case, you can remain in the U.S. Hopefully it will get approved once they review the RFE response.

Can a immigrant on K1(fiance visa) arrive US and then marry someone else, instead of me the Petitioner for K1 (me US Citizen)?

No, if enters on K-1 visa and remains in the U.S., can do not get green card from original petitioner of k-1 visa.