NEW YORK: New York goes to the polls on Tuesday in a pivotal presidential primary tipped to hand Hillary Clinton and Donald Trump victories in the race to clinch the Democratic and Republican tickets to the White House. The former secretary of state, first lady and New York senator leads the polls by double digits over her Brooklyn-born challenger, Bernie Sanders, even if nationwide surveys put them neck and neck. Trump, the brash Manhattan billionaire whose controversial campaign has appalled the Republican establishment, is streets ahead of his evangelical rival Ted Cruz and Ohio Governor John Kasich. The tycoon is banking on a big home state victory in his quest to sew up the nomination before Republican grandees can deny him the ticket and anoint another candidate at the party convention in July. The polls open at 6:00 am (1000 GMT) and close at 9:00 pm (0100 GMT Wednesday) when Clinton and Trump have scheduled what they hope will be victory parties in Manhattan.