US President Donald Trump has signaled a potential U-turn on his trade war with China amid continued market volatility, saying the high tariffs on Chinese goods will "come down substantially, but it won't be zero." Trump's remarks, made at a White House news event Tuesday, appear to mark a rhetorical climbdown after weeks of tough posturing and tit-for-tat retaliation that sent tariffs on China beyond a staggering 145%. "145% is very high and it won't be that high," Trump said in a question-and-answer session with reporters in the Oval Office. "It won't be anywhere near that high. It'll come down substantially. But it won't be zero."