How can we support all the terrible things China does without both taking an official policy stand against them, and doing the best we can to fix the problem? At the same time, if we use trade barriers on China it can only be beneficial for our struggling job market here in the US.
The US is the largest consumer on the face of the Earth and as such has the largest impact on the world's largest supplier, China. By cutting of trade with China, there can, but not necessarily will be, increased production domestically, drops in abuse in China (or at least less because of unemployment), and other changes within this paradigm.
#1 Sanctions only effective on weak economic and isolated countries. China by no means would stand for such action and would probably fight back or destroy the world economy before such an action is effective. (a corned animal fights the hardest.)
#2 China is the world largest trading nation. Meaning its trade is divers.
Thus a trade sanction would harm all those who trade with China including USA.
#3 economic isolation/sanction isn't that great for improving human right.
China when it was economic isolated didn't have many options (mao era) and only resorted to desperate acts that would only harm china human right record.
#4 China is presently has a strong nationalist identity (see sino-Japan relation) such a obvious attack By US would trigger further nationalist sentiments. And strength CCP (or any Chinese government) position.
The USA should know better than to try and intimidate China. With more than four times the population as America, and thousands of years of history, China is a strong culture and its customs may seem strange to Americans. Backing this super-power into a corner with sanctions won't change the way China treats its citizens and may increase perceived abuses and indignant behavior.