China has suggested arming Hawaii's independence activists in retaliation for U.S. arms sales to Taiwan and recently threatened to challenge American sovereignty by making legal claims to the Pacific islands as its territory.

Chinese threats to back several groups of Hawaiian independence activists who want to restore the islands' constitutional monarchy, ousted in a U.S.-backed coup over a century ago, has raised concerns that military facilities on the strategic central Pacific archipelago are threatened at a time when the Obama administration is engaged in a major shift toward Asia as part of its military and diplomatic rebalance.