Analysts say a US law supporting pro-democracy protesters in Hong Kong may unsettle trade talks with China.
However it is unlikely to derail them.
The US president has signed into law a bill that requires an annual review of Hong Kong's special status with the US.
The law comes as the world's two largest economies are trying to end their trade war.
China responded strongly, with its foreign ministry threatening counter-measures if the US continued going down the wrong path.