WASHINGTON/BEIJING (Reuters) - The United States and China are close to agreement on the first phase of a trade deal, U.S. President Donald Trump said on Tuesday, after top negotiators from the two countries spoke by telephone and agreed to keep working on remaining issues.Trump said Washington was in the "final throes" of work on a deal that would defuse a 16-month trade war with Beijing, but also underscored Washington's support for protesters in Hong Kong, a potential huge sore point with..