and louise hirschfeld cullman. bernard and irene schwartz. judy and josh weston. the cheryl and philip milstein family. the citi foundation. supporting innovation and enabling urban progress. sue and edgar wachenheim, iii. corporate funding is provided by mutual of america-- designing customized individual and group retirement products. that's why we are your retirement company. additional support has been provided by: and by the corporation for public broadcasting, and by contributions to your pbs station from viewers like you. thank you. from the tisch wnet studios at lincoln center in new york, megan thompson. >> thompson: good evening and thanks for joining us. a day after agreeing to reach a cease-fire in syria within a week, world leaders met today to end the five-year civil war that has fueled europe's migrant crisis and may have cost half a million lives. diplomats from the united states, russia, turkey, saudi arabia, and iran are among those attending an annual security conference in munich, germany. secretary of state john kerry criticized russia for bom

and louise hirschfeld cullman. bernard and irene schwartz. judy and josh weston. the cheryl and philip milstein family. the citi foundation. supporting innovation and enabling urban progress. sue and edgar wachenheim, iii. corporate funding is provided by mutual of america-- designing customized individual and group retirement products. that's why we are your retirement company. additional support has been provided by: and by the corporation for public broadcasting, and by contributions to your pbs station from viewers like you. thank you. from the tisch wnet studios at lincoln center in new york, william brangham. >> brangham: good evening, and thanks for joining us. we begin tonight with politics. since 1952, new hampshire has held its influential, first-in- the-nation presidential primary, and will do so again three days from now. tuesday's ballot features the two democrats and eight republicans still in the running for the white house. new jersey's chris christie is one of three current or former governors reaching for the top tier of the republican pack. >> y

and louise hirschfeld cullman. bernard and irene schwartz. judy and josh weston. the cheryl and philip milstein family. the citi foundation. supporting innovation and enabling urban progress. sue and edgar wachenheim, iii. corporate funding is provided by mutual of america-- designing customized individual and group retirement products. that's why we are your retirement company. additional support has been provided by: and by the corporation for public broadcasting, and by contributions to your pbs station from viewers like you. thank you. from the tisch wnet studios at lincoln center in new york, this is pbs newshour weekend. >> stewart: good evening and thanks for joining us. presidential candidates are rallying supporters to turn out at tomorrow's iowa caucuses, the 6first votes that count in the 2016 race. the final "des moines register" poll, released last night, shows the first choice of likely republican caucus-goers is: donald trump, 28% ted cruz, 23% marco rubio, 15% ben carson, 10% rand paul, 5% and chris christie, 3%. jeb bush, john kasich, carly fiorin

and louise hirschfeld cullman. bernard and irene schwartz. judy and josh weston. sue and edgar wachenheim, iii. corporate funding is provided by mutual of america-- designing customized individual and group retirement products. that's why we are your retirement company. additional support has been provided by: and by the corporation for public broadcasting, and by contributions to your pbs station from viewers like you. thank you. from the tisch wnet studios at lincoln center in new york, alison stewart. >> stewart: good evening and thanks for joining us. the 2016 race for the white house is entering a new, faster- paced phase, with roughly 90% of the delegates in the nominating process still up for grabs. after winning yesterday's first- in-the south primary in south carolina and sweeping all 50 republican convention delegates, businessman donald trump is in the lead. trump and his rivals are now focusing on the dozen states holding primaries and caucuses on march 1, known as "super tuesday," when a quarter of the nominating delegates are at stake. next saturday,

and louise hirschfeld cullman. bernard and irene schwartz. judy and josh weston. the cheryl and philip milstein family. the citi foundation. supporting innovation and enabling urban progress. the john and helen glessner family trust. supporting trustworthy journalism that informs and inspires. sue and edgar wachenheim, iii. corporate funding is provided by mutual of america-- designing customized individual and group retirement products. that's why we are your retirement company. additional support has been provided by: and by the corporation for public broadcasting, and by contributions to your pbs station from viewers like you. thank you. from the tisch wnet studios at lincoln center in new york, hari sreenivasan. >> sreenivasan: good evening and thanks for joining us. campaign 2016 is in the fly-by phase before primaries and caucuses in a dozen states two days from now, including seven southern states. today, democrat hillary clinton campaigned in tennessee and arkansas, while her lone rival, vermont senator bernie sanders, was in minnesota, colorado, and oklah

cullman.. and louise hirschfeld bernard and irene schwartz. judy and josh weston. the cheryl and philip milstein family. the citi foundation. supporting innovation and enabling urban progress. sue and edgar wachenheim, iii. corporate funding is provided by mutual of america-- designing customized individual and group retirement products. that's why we are your retirement company. additional support has been provided by: and by the corporation for public broadcasting, and by contributions to your pbs station from viewers like you. thank you. from the tisch wnet studios at lincoln center in new york, william brangham. >> brangham: good evening and thanks for joining us. the body of supreme court justice antonin scalia is expected to be flown home to virginia over the next 48 hours following his sudden death yesterday in texas. to honor scalia, president obama ordered american flags to fly half-staff today at the supreme court in washington and at federal buildings around the nation. like so many other political leaders, president obama has offered his condolences to

and louise hirschfeld cullman. bernard and irene schwartz. judy and josh weston. the cheryl and philip milstein family. the citi foundation. supporting innovation and enabling urban progress. sue and edgar wachenheim, iii. corporate funding is provided by mutua

and louise hirschfeld cullman. bernard and irene schwartz. judy and josh weston.

and louise hirschfeld cullman. bernard and irene schwartz. judy and josh weston.ti foundation. supporting innovation and enabling urban progress. sue and edgar