In a state where Republicans have not held a Senate seat since 1994, Mike Katz — pediatric anesthesiologist, former Democratic lawmaker, and twice-registered party-switcher — has won Delaware's GOP primary and will face three-term incumbent Chris Coons in November. His journey across the political spectrum reflects a broader American restlessness with partisan identity, even as the structural realities of a heavily Democratic state loom large. Whether voters read his crossings as principled evolution or convenient reinvention may well determine the outcome of a race that history suggests shoul