A Clinton family ally reportedly tried to stop the publication of a book about a "deep state" plot to undermine President Trump. Sidney Blumenthal, who was an outside political adviser to Hillary Clinton, claimed 'investigative journalist Lee Smith's new book was defamatory and sent threatening letters to publisher Center Street, a division of Hachette Book Group, according to a Fox News source. But the source said the publisher's legal team found the threat to be "meritless," and the book, The Plot Against the President: The True Story of How Congressman Devin Nunes Uncovered the Biggest Political Scandal in U.S. History,...