Complex sentence: Surakiart's candidature may be adversely affected by the controversial policies of Thaksin Shinawatra, who's relations with the military junta in Myanmar and handling of unrest in the predominantly Muslim south of the country are particularly contentious.
Split into simpler sentences: Surakiart's candidature may be adversely affected by the controversial policies of Thaksin Shinawatra. Its relations with the military junta in Myanmar and handling of unrest in the predominantly Muslim south of the country are particularly contentious.