Can filing for bankruptcy effect an immigrant visa petition?

I am a U.S. citizen. I petitioned my wife last year and she is here now. My step daughter's petition is still in the works. It has left the USCIS and should be in consular processing now. I have signed an affidavit of support for both of them, and I understand that filing for bankruptcy will not release me from that obligation; that's not what I'm trying to accomplish. I am filing for financial reasons and I want to make sure it will not negatively effect the visa approval for my step daughter. I have been told that the government only looks at income; my income is ~50,000/year, which should be plenty. is that true?