Nearly a hundred members of the United States Congress will not return after this session ends — a convergence of voluntary retirements and primary defeats that, taken together, represents a level of turnover without modern precedent in a single election cycle. Some chose departure; others had it chosen for them by their own party's voters. What this moment reveals is something deeper than political arithmetic: a fracturing of the compact between long-serving legislators and the constituencies that once sustained them. The incoming Congress will be shaped less by what it inherits than by what