My doughter has two children with her partner and she is

Hi, there. Thank you for your question and the concern for your grandchildren. To clarify, by "joint division," it sounds like you are referring to a joint custody situation? Were your daughter and her partner ever married or legally bound to one another?In the U.S., grandparents have very few custodial rights to their grandchildren. They are strengthened by having played a parental role in their grandchildren's lives or by being able to prove that they play a stabilizing role in their lives. Their appeals are also considered more strongly if they have documentation of their positive influence in the children's lives.The appeal is weakened considerably if the parents were not married, as the grandparents have no real legal right to be in the children's lives.The following article is an excellent discussion of the ins and outs of this very topic. I highly recommend it for further reading. I am, of course, also available for further discussion. I hope this has helped!