Taiwan's main opposition Kuomintang is choosing a new leader. The main contestants are former lawmaker Cheng Li-wun; former Taipei mayor Hau Lung-bin; lawmaker Lo Chih-chiang; Sun Yat-sen School president Chang Ya-chung; former Changhua County chief Cho Po-yuan and former National Assembly member Tsai Chih-hung. High on their priority list: addressing the party's relationship with China. But that's also raising eyebrows in Washington.