Clinton campaign chairman: Sanders's winning streak is over
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Democratic presidential front-runner Hillary ClintonHillary Diane Rodham ClintonBiden faces do-or-die primary in South Carolina President Trump's assault on checks and balances: Five acts in four weeks Schiff blasts Trump for making 'false claims' about Russia intel: 'You've betrayed America. Again' MORE's campaign chairman is dismissing a string of recent wins by rival Bernie SandersBernie SandersAdvisor: Sanders could beat Trump in Texas Bloomberg rips Sanders over Castro comments Liberal author Matt Stoller: Iowa caucus screw-up was 'Boeing 737 Max of the Democratic Party' MORE, saying the former secretary of State is well positioned in upcoming contests.

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"We've got six contests coming up on the East Coast. They're more diverse," said John Podesta on ABC's "This Week." "They're primaries, not caucuses. So has he done well in these Western caucuses? Yes. But we think when you get to bigger states, diverse states, primary states, we're going to do very well."

Podesta's comments come after a win for Sanders in Wyoming, where he will pick up seven of the state's 14 delegates.

The Vermont senator now won seven of the last eight Democratic contests, but the Clinton campaign thinks the streak will end there.

"This is the best territory for him on the calendar," he said. "Most of those were Western caucuses. But when you look at what happened overall in this election, she's gotten 2.4 million more votes than Bernie Sanders."

The Democrats are campaigning hard ahead of New York's April 19 primary, where 291 delegates are up for grabs. Clinton has a 14-point lead over Sanders in the state, according to a RealClearPolitics average of polls.