Honoring Mark Shields and his decades of political analysis

For more than 30 years, Mark Shields has provided critical context and perspective to some of the most historic moments in American politics. He became a weekly guest on "The MacNeil/Lehrer NewsHour" during the 1988 presidential election, bringing a wealth of political experience. And through it all, he's been a guiding force. On his last regular NewsHour appearance, we pay tribute to his legacy.