Remember Rick Perry's presidential campaign? Me neither. But at one time the Texas Governor was the GOP frontrunner. Then, through a combination of gaffe-laden debates and behind-the-scenes disorganization, his campaign imploded. James Carville went so far as to call it "the worst presidential campaign/candidate in American history." In an except from his new book, Texas Tribune reporter Jay Root, who spent months following the Perry campaign, gives an explanation for Perry's cringe-worthy debate performances and general campaign mismanagement: he was just very sleepy.