His Plan for America says the following about Darfur (pp. 33-34):
We must also work with the United Nations and Africa's regional organizations to address Africa's persistent, disproportionate share of the world's weak, failing states and chronic armed conflicts, and promote sustainable economic development. We support extension of the African Growth and Opportunity Act, which provides a door to a brighter future for many of the continent's poorest countries. We will also support effective relief efforts when there is a humanitarian crisis--particularly at this moment in Darfur, Sudan, where genocide is underway.
Although Kerry does use the word "genocide," there's no indication he would do more than what Bush is doing: relying on the U.N. to gum the Sudanese government into submission with its toothless resolutions. In particular, this paragraph bespeaks a deafening absence of readiness to help with an international peacekeeping force. Add to this Kerry's hasty promises to pull the troops out of Iraq, and isolationism comes to mind.