No. Your situation will have no effect on her Naturalization and will not effect your contract with the US Government as her sponsor (I-864).

If my brother was born in Mexico but both parents are us citizens how would I be able to bring the baby over ?

The best way for the parents to determine whether their child is a USC through them is to apply file to register the child with the US Consulate as...

No. You do not qualify for DACA. The requirements are stated by my colleague.

Yes. You are free to travel outside the USA. Be mindful of the amount of time you spend outside the USA.

How can I get i797 from USCIS if employer is not ready to give it to me?

The attorney who prepared the petition will have what you need and should be guiding you through the process.

Bring the document to the interview.

Important Us Citizenship/ Naturalization question

I agree with my colleague. Bring the W-2 to the interview.

I agree with my colleague. Travel with your Green card and travel document or passport or file for US passport.

I am Mexican who works in US with TN visa and got a new I-797A. Can I travel to Mexico and come back with the same form I-797A?

Generally an TN visa is a multiple entry visa.

Question regarding Public Benefits for special needs US citizen child (I-944 form)

Answer all questions fully and completely. Your child is a USC and is entitled to benefits.