By Mataeo Smith Melania Trump’s years-long rivalry with her stepdaughter Ivanka has been revealed in a new book \- along with the cruel nickname she has for her husband’s favourite. The book describes the struggle Melania Trump, the wife of former president Donald Trump, had with her stepdaughter Ivanka after she first decided to remain in New York after her husband’s election. In an attempt to shield her 10-year-old son Barron Trump from the spotlight that comes with holding the nation’s highest position and to enable him to complete his education, she made the decision to remain in their hou…