Donald Trump has won the Republican presidential primary in California, the biggest prize in his triumphant run to become the GOP nominee.
Trump will now go on to the national convention in July with more than enough delegates to become the official nominee. But his candidacy remains a source of controversy, with many in the GOP struggling to rally behind the brash billionaire.
Earlier Tuesday, House Speaker Paul Ryan said comments Trump made accusing a district court judge of passing a racially motivated judgment against him were the "textbook definition of a racist comment." And Sen. Mark Kirk of Illinois withdrew his support from the presumptive nominee.
