Groomed to perfection yet rarely heard in public, Melania Trump is an enigma a first lady whose opinions, marriage and goals remain a mystery to millions of Americans. She is without question a unique first lady a former model who once posed nude in her husbands private jet the first foreign-born wife of a US president in nearly 200 years and the first for whom English is a second language. A year after channelling Jacqueline Kennedy in powder blue Ralph Lauren at her husbands inauguration, Trump has yet to embrace a cause, as did Michelle Obama with her anti-obesity campaign or Laura Bush and her literacy program. For months, she stayed in New York, refusing to move to the White House until her young son Barron of whom she is said to be fiercely protective finished the school year. She is infrequently seen in Washington and costing law enforcement tens of thousands of dollars a day in protection.