Senator says : South is likely to vote for independence , raising specter of more war with North . Congress must commit to laying groundwork for peace between North and South , he writes . Senator says the situation resembles Middle East in its strengths and weaknesses . Commitment to revive peace process in Darfur also essential , he writes .
John Kerry : South Sudan likely to vote for independence , raising specter of more war with North . Congress must commit to laying groundwork for peace between North and South , he writes . Senator says the situation resembles Middle East in its complexity and pitfalls . Commitment to revive peace process in Darfur also essential , Kerry writes .