As a weak actor in the U.S.-China-Taiwan triangle, what is Taiwan's role in influencing interaction between the United States and China? This paper analyzes the events from 1995 to 2015 to investigate the power of Taiwan-related behaviors in explaining the variations in U.S.-China relations. Statistical analysis in this paper suggests the existence of Taiwan's indirect triangular effect on U.S.- China relations but direct influence from Taiwan is not as significant as expected. Taiwan's indirect triangular effect works in different forms for the United States and China. For China, it is clear that China's cost-benefit analysis in the strategic triangle is influenced by U.S.-Taiwan interactions. For the United States, the statistical result suggests the policy toward Taiwan often leads to policy adjustments toward China, which show a clear preference of the United States to balance cross-Strait relations through its domestic policy-making process.