Still weeks away from returning to office, Donald Trump is showing himself to be as petty and vindictive as he was in his first term, turning the tragic, devastating wildfire crisis in Los Angeles into a political gotcha game with distorted lies and accusations.

Martin Adams, former general manager of the Los Angeles Department of Water and Power, blows up some right-wing myths about the water supply in Pacific Palisades, and talks with Alex Wagner about the realities of municipal water systems and ideas for adapting a system built for occasional residential fires to deal with a large scale, community-wide fire.