Victorious Trump sets sights on Clinton, running mate

By Ginger Gibson and Alana Wise INDIANAPOLIS, Ind. (Reuters) - Billionaire Donald Trump assumed the mantle of presumptive Republican presidential nominee on Wednesday with a mixed message on party unity and a clearer one for his next likely target, Democrat Hillary Clinton. The former reality television star, who has never held public office, won a commanding victory in Indiana's primary on Tuesday, forcing his main rival, Ted Cruz, to drop out of the race. Trump can now prepare for a match-up i