consulting one's father

Parents approval for a marriage

Q: I have two questions.

I met a guy who I am very in love with and we want to get married as soon as possible. His parents agree, my parents are divorced, and my mother agrees. But he is from a different nationality than I am and I am scared that my father will not accept. I know that this is not an acceptable reason to deny a marriage in Islam, but what are the exact hadeeth or ayat that I can mention in my argument?

My second question is, in the case that my father still wouldn't let me marry him, can I go ahead and marry him anyways given that the reason my father denied him (nationality) is a reason that is unacceptable in Islam?

Girl getting married without consulting her father

Q: I would like to know, I am separated from my elder daughter's mother, and my daughter lives with the mother. My daughter made nikaah a few days ago, and she used consent from her mother's current husband, although I maintained her all through the years, but when she graduated from university, and started working, she distanced herself from me. There was a proposal for her, which I was informed about, but as time passed, approvals, wedding dates were set by her mother, without consulting me. Subsequently the nikaah happened last Saturday. I was not informed by either her or her mother about the date. I would like to know is it permissible for her to use her mother's current husband as a person to give consent for the nikaah?