Bob Novak stopped by the Heritage Foundation today for a lunchtime discussion with conservative bloggers about his new professional autobiography, The Prince of Darkness. While he lamented the practice of reporters acting as opinion drivers and news analysts, Novak wasn't shy about offering a few opinions of his own. When asked to rate the current field of Republican presidential candidates, Novak didn't have any kind words for the current top-tier field of Rudy Giuliani, Fred Thompson, Mitt Romney and John McCain.