Trump faces unity challenge; Kasich bows out

By Steve Holland WASHINGTON, Reuters - Donald Trump's last remaining challenger for the Republican Party presidential nomination, John Kasich, dropped out of the race on Wednesday, U.S. media reported, leaving the presumptive nominee with the task of uniting a fractured party around his White House bid. Ohio Governor Kasich, who had stubbornly persisted with his campaign despite never having a viable path to the nomination, canceled a media appearance on Wednesday in Virginia and scheduled a 5 p