Sanders poised for Wisconsin win over Clinton
Bernie Sanders is trying to keep his momentum going heading into Tuesday's Wisconsin primary, where 86 Democratic delegates are up for grabs. Most of its voters are white, with a high number of young people. That's good for Sanders, who has a narrow lead in our CBS News battleground tracker. Hillary Clinton's campaign manager is looking ahead, saying in a memo that her overall lead will be hard to beat. Nancy Cordes reports.