Sunday on PBS News Weekend, candidates make their final pitch in bitterly cold Iowa on the eve of the first contest of the 2024 presidential election. Then, the growing humanitarian crisis in Afghanistan, two and a half years after the Taliban's return to power. Plus, why American farmers have some of the highest suicide rates of any occupation, and what some rural communities are doing to help. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders