Prime Minister Silvio Berlusconi on Wednesday denounced what he called widespread fraud at Italy's general election and demanded his center-left rival Romano Prodi be stripped of victory. Prodi immediately condemned Berlusconi's efforts to overturn the results of the April 9-10 election, the closest in modern Italian history, and his allies warned that the prime minister was stoking dangerous political tensions. The stand-off between the leaders of Italy's two main coalitions pushed Europe's fourth largest economy into uncharted waters and toward a full-blown crisis. "The election result has to change because there was widespread fraud," Berlusconi told reporters after meeting President...