Sunday on PBS News Weekend, we get a preview of this week's Supreme Court hearings on congressional redistricting and a clash between free speech and civil rights. Then, we take a closer look at the movement toward a global agreement on reducing plastic pollution. Plus, how ongoing violence and instability in Haiti is creating chaos in a nation plagued by natural disasters and political turmoil. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders