Tom Steyer makes climate change a top priority in 2020 bid

Billionaire businessman Tom Steyer told NewsHour Weekend Sunday that “saying something different” sets him apart from the crowded field of Democratic candidates seeking to become the president next year. He joins Yamiche Alcindor from the campaign trail to discuss why climate change is his top priority, his years-long push to impeach President Trump and why no one can call him "a socialist."