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Milwaukee is one of the most segregated cities in the country, and statistically one of the worst for African-Americans. We explore key factors in the city's racial divide ahead of Thursday's Democratic debate.

Sunday on NewsHour Weekend: In New Hampshire, White House hopefuls knock on doors and rally supporters in advance of Tuesday's primary. Also, fact-checking Saturday's Republican presidential debate. And later, making a tax credit for low-income Americans available to more people.

Saturday on NewsHour Weekend: Republican presidential hopefuls hunker down in New Hampshire, while the Democratic candidates look beyond the first primary. Later, in our signature segment, the campaign road ahead: How the complex delegate rules of individual states help determine…