They all should, Trump has released his birth certificate.
https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwiFjtuH85rKAhXJVyYKHapOCCQQjRwIBw&url=http%3A%2F%2Fwww.businessinsider.com%2Fdonald-trump-real-birth-certificate-2011-3&psig=AFQjCNFnj92vHSBV4nt9vwHld2tDfq_tdQ&ust=1452365984178996
Trump has not released his father's or mother's birth certificate.
Yet you don't seem concerned about that.