Answer:
Yes, US should emphasise on its toy trade relationship with China. Yes, US can control China's manufacturing.
Explanation:
Yes ! As 80% of toys sold in US are being manufactured in China, former should place greater emphasis on its toy trade relationship with latter.
US can also control china's manufacturing more, by levying higher quality standards for toys - to be accepted as imports by US.
US gets major domestic toy demand satisfied from chinese toy imports. So, its crucial & worth emphasising for it. China also exports significant toys to US, so it's export production can be controlled by US.