The author is Bob Tyrrell.  He’s also the founder and editor-in-chief of The American Spectator.  His book is The Death of Liberalism.  His view of Liberals:

“They were the dominant ideology in this country 50 years ago.  Utterly dominant.  They dominated the entire scene in America.  And yet today, they’re down to 20% of the American electorate. There are more nudists in America than there are liberals.”