Political sensitivities over involvement by the United States in Mexico are longstanding, but changes under the new president, Enrique Peña Nieto, have rattled American officials.
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Friction Between U.S. and Mexico Threatens Efforts on Drugs
Political sensitivities over involvement by the United States in Mexico are longstanding, but changes under the new president, Enrique Peña Nieto, have rattled American officials.
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