Change in policy towards Taiwan could harm ties with China: Obama
US President addresses news conference in Washington.
The United States President Barack Obama has said change in Washington policy toward Taiwan could lead to significant consequences in American relationship with China.
At a news conference in Washington, he said the idea of one China is at the heart of their conception as a nation.
The president said he had advised Trump that foreign policy had to be conducted in a systematic, deliberate and intentional way.