Money! Power! Sex! Trumps! Home-improvement magnate John Menard and Carmel executive Steve Hilbert used to be tight. Then an ill-fated business venture between the iron-willed, bootstrap billionaire from Wisconsin and the flamboyant former insurance tycoon from Indiana lit up courthouses from Hamilton County to Eau Claire. Now, wives, family, employees, business associates—including Donald and Melania Trump—and anyone else standing too close to the flameout are feeling the heat from tawdry allegations and bitter recriminations. How did their friendship—and four years of gloves-off litigation—turn so ugly?