HOW long can former prime minister P.V. Narasimha Rao escape the charge that money was paid to Jharkhand Mukti Morcha (JMM) MPs to save his government in 1993? This question popped up again last week after the CBI arrested sitting JMM MP Shibhu Soren and three former MPs—Suraj Mandal, Shailendra Mahto and Simon Marandi—in Delhi and Jamshedpur, charging them with accumulating Rs 3.5 crore without being able to explain where it came from.