Congo rebel revival endangers elections: ambassador to U.N

By Aaron Ross KINSHASA (Reuters) - The Democratic Republic of Congo has told the United Nations that a re-emergence of the M23 rebellion in the east is endangering a deal with the opposition intended to lead to a presidential election this year. President Joseph Kabila is meant to step down after the election under the agreement, which defused unrest prompted by his failure to step down as his mandate ended in December. In a letter to the president of the U.N. Security Council, Congo's ambassado