Protesters have become a regular feature at book signings by Sen. Hillary Clinton (D-N.Y.), but so far, according to Clinton's publisher, Simon & Schuster, they haven't hurt sales. Now Clinton may have another problem that could: conservative blonde nemesis Ann Coulter and her new bestseller, Treason. Living History, Clinton's book, continues to do a brisk business, yet by the beginning of the week Coulter's anti-liberal tome had buried it on Amazon's nonfiction bestseller list. Treason started the week in the No. 1 spot, while Living History had fallen out of the top 10. Unfazed, Clinton has kept a heavy schedule...