President Abbas will play a decisive role in choosing the next prime minister . He says he supports those who are appointed to a U.N.-backed tribunal . The tribunal is expected to try Hezbollah members in Rafik Hussein 's government .
Walid Jumblatt could play a decisive role in choosing the next prime minister . He says he supports those who are opposed to a U.N.-backed tribunal . The tribunal is expected to indict Hezbollah members in Rafik Hariri 's assassination .