SINGAPORE (AP) World markets were broadly lower on Thursday as traders focused on tensions between the U. S. and China and braced for the impact of their tariff hikes. Polls for the European Parliament opened in the Netherlands and the U. K. , with 26 other members of the European Union to follow before it ends Sunday night. Preliminary private surveys showed that the bloc's composite purchasing managers' index picked up slightly in May, although manufacturing and services activity slowed. 40...