Senior Republican activists have launched two high-profile campaigns aimed at sabotaging Senator Hillary Clinton's hopes of an elected return to the White House - even though the next presidential contest is three and a half years away.It was also revealed last week that Mrs Clinton is to be the unwilling subject of a book in the autumn which will reportedly contain explosive revelations from her time as First Lady. The book, The Truth About Hillary: What She Knew, When She Knew It, and How Far She'll Go to Become President, is being written by Ed Klein, a best-selling biographer and...