LAS VEGAS (AP) — The CES 2019 gadget show, which kicks off Sunday, will showcase the expanding influence and sway of China's rapidly growing technology sector. But some of its firms are stepping back from the spotlight amid rising U.S. national-security concerns over Chinese tech and a trans-Pacific trade war launched by President Donald Trump.

Last year, a top executive of the Chinese telecom firm Huawei delivered a CES keynote address critical of AT&T's abrupt cancellation of plans to sell a Huawei phone following espionage concerns raised by the U.S. government. This year, Huawei's chief fi...