When Doug Chin became the AG he took an oath of office to support and defend the Constitution of the United States.  The Trump administration is attacking Constitutional principles such as nondiscrimination, equal protection, and due process.  These are principles that form the foundation of the society in which we live.  AG Chin has a duty to defend Hawaii against the assaults against the Constitution.

As to whether Chin has his sights on being Governor, the AG in Hawaii is appointed, not elected, as they are in many other states.  No AG in the history of Hawaii has been elected Governor.