Democratic Battle for New York Heats Up

While Bernie Sanders celebrates another caucus win, Hillary Clinton stays confident in her lead.
1:59 | 04/10/16

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Transcript for Democratic Battle for New York Heats Up
The democrats are battling for New York's giant delegate prize as well. Bernie sanders celebrating the Wyoming caucus win, saying he'll keep the momentum right until the convention. Hillary Clinton saying she's confident she'll keep his lead. David Wright with the democrats tonight. Reporter: Today at coney island, no time for fun and games on the boardwalk. Bernie sanders grabbed a hot dog at Nathan's near the world-famous cyclone. Are you guys ready to go on the death ride? The one that goes all the way down? Reporter: He could easily have been talking about the topsy-turvy democratic race for president. He's vowing to contest the nomination all the way to the convention. Telling George on "This week," he'll fight to prevent a Clinton coronation. I think the momentum is with us. We've come a really, really long way. And I think we can win this. Reporter: Hillary Clinton insists sanders is wrong. I feel good, and I expect to be the nominee. Reporter: New York could be the key to determining who's right. Clinton is ahead in the polls and pulling out all the stops. Bill Clinton stumping for her. She's 2.3 million votes ahead. And 250 delegates ahead. How could you even ask that? Reporter: But swiping through may not be as easy as she hoped 679. Last night, she joked with new York's mayor about the metro card. Will you just fix these metro card slots in the subway? The New York City subway is the best way to get around. Reporter: On "Saturday night live," the joke was entirely at her expense. Is this a working metro card? Reporter: A little more than a week to go before the New York primaries, state officials have reported an unprecedented last-minute surge in registrations. David, thank you. And overseas to the terror investigation in Brussels. A stunning new revelation after the arrests of several suspects. Including the man in the hat,

This transcript has been automatically generated and may not be 100% accurate.

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