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- China's likelihood of invading Taiwan in the next decade is "more than 50%," Matthew Pottinger said.
- Pottinger previously said an invasion depends on how long Chinese leader Xi Jinping stays in power.
- Pottinger served for two years as one of the Trump administration's top Asia security advisers.
China is more than 50% likely to invade Taiwan in the next 10 years, said Matthew Pottinger, who served as deputy national security adviser in the Trump administration.