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Bernie Sanders struggles to stop Hillary Clinton's momentum

| Democratic front-runner Hillary Clinton has more than 600 delegates than Sen. Bernie Sanders, even after his two wins on Super Saturday. The two fought over issues such as fracking and the Flint water crisis in Sunday's debate in Michigan, but Clinton remains the favorite in Michigan's primary on Tuesday. With analysis of the debate and a preview of the Michigan primary, CBS News' Nancy Cordes joins CBSN.