A call between President Donald Trump and Chinese President Xi Jinping is expected "very soon," the White House said Tuesday, as markets searched for any sign that U.S.-China trade

talks are getting back on track. China has vowed to fight back over what it called “discriminatory restrictive measures” by the U.S. that it said are endangering an agreement hammered out

between the two countries last month, as MarketWatch reported Monday. The U.S. has accused China of "slow rolling" its commitments. U.S. stocks were rising Tuesday, buoyed by a

report showing signs of labor-market health, even as investors awaited signs of trade progress.