"Rejection will set off a downward spiral that could disrupt stability in Asia, diminish the chance of a dialogue across the Taiwan Strait, and deflate hopes for a more constructive relationship between the U.S. and China, " Berger said.
Some analysts believe that Roberts's decision to find a legal way to uphold Obamcare in 2012 was partly motivated by a desire to protect the court he leads from the severe political blowback a rejection of the law could have set off.
Nevertheless, a final joint statement set out several points of agreement, including the rejection of foreign intervention in the conflict-stricken country.
U.S. rejection of normal trade relations with China would set off a "downward spiral" in Asia and hurt chances of a China-Taiwan dialogue, he explained.