Thursday on the NewsHour, Hillary Clinton and Sen. Bernie Sanders ready for PBS’s Democratic debate in Milwaukee. Also: How Egypt’s courts enforce the government crackdown, spacetime ripples prove the theory of relativity, puppies conceived by IVF may help save endangered…

Wednesday on the NewsHour, presidential candidates move on to South Carolina after Donald Trump and Bernie Sanders claim New Hampshire victories. Also: Analyzing the next phase of the White House race, checking in on Egyptian leaders of the Arab Spring,…

Friday on the NewsHour, Democrats square off in a contentious debate as Republican candidates jockey for survival days before the New Hampshire primary. Also: A report from the epicenter of the Zika outbreak, the many lives of Syrian refugees living…

Thursday on the NewsHour, candidates double down on attacks as the New Hampshire primary approaches. Also: Colombia’s president asks for U.S. aid to help FARC peace efforts, new Syrian hostilities threaten diplomatic talks, the controversy over online daily fantasy sports,…

Wednesday on the NewsHour, Democratic candidates debate liberal credentials while Republicans brawl over victory margins. Also: How to fight the Zika virus, Sweden suffers vigilante violence over refugees, Yahoo faces financial struggles, a three-parent DNA treatment raises debate, big data…

Tuesday on the NewsHour, after Cruz and Clinton claim victory in Iowa, candidates shift their focus to New Hampshire. Also: What’s at stake going into the next round of primaries, the Islamic State’s expansion in Libya, San Francisco police face…

Monday on the NewsHour, it’s caucus night in Iowa. We preview the nation’s first voting contest with a look at Evangelicals' role in shaking out a crowded GOP field, Amy Walter and Tamara Keith update what's happening on the ground,…