“It’s not just bad social policy. It’s incredibly bad politics,” said GOP consultant Mike Madrid, who has been vociferously imploring his party to renounce Trumpism and expand its electorate. He was among a group of former California Republican Party political directors who signed a recent letter urging the rejection of “messages of hatred, division and rhetoric that divides us by race.”

Vietnamese-Americans, Madrid said, represent “the only ethnic diversity in the party to speak of.”