NEW YORK (Reuters) - Global equity markets fell on Monday amid unease over the impact of the U.S.-China trade war on China's growth, while the dollar gained against the euro as Italian bond yields spiked on a brewing spat over Italy's budget plans. European markets slid, with defensive stocks under pressure as investor confidence took a hit from last week's spike in Treasury yields and heightened expectations for further U.S. interest rate hikes by the Federal Reserve.On Wall Street, the..