The Trump administration made a big mistake adding mothers-in-law and fathers-in-law to the list of relatives allowed entry under the travel ban while excluding grandparents and other close blood relatives.  I think it was done because Syrian-born Ismal Elshikh, the iman of a Honolulu mosque and a plaintiff in Hawaii’s challenge to the ban, said it prevented his mother-in-law from visiting Hawaii and seeing his five children.  She is Elshikh’s mother-in-law, but she could have entered as the mother of his wife who is a U.S. legal resident.  I do not know why this simple biological fact was not mentioned in Hawaii’s challenge to the ban or in the Trump administration response.