Is a child born to a US citizen mother and Mexican citizen father cosidered to be a us citizen?

do n/ot under question. are you making reference to the father of the child or to the child? if you are making reference to the father, who apparrently is not a u.s. citizen, the mother, who is a u.s. citizen, can apply to immigration and apply for her husband to come to the u.s. legally. should the father of child already be here legally, then he must apply for u.s. citizenship. the child is a u.s. citizen by virtue of mom being a citizen. good luck..just go to immigration office or if you have a computer, crank in bcis, u.s. government and you will find all types of answers...