Wendy Cleland-Hamnett, a former Environmental Protection Agency official, fought for years to protect American consumers from toxic chemicals found in everyday products. Nancy B. Beck, a scientist who worked for the chemical industry, saw these efforts as overregulation by the federal government. This is the story of the E.P.A. under President Trump, as told by the shifting powers of two women. Guests: Eric Lipton, a Washington-based correspondent for The Times; Ms. Hamnett, who was the top E.P.A. official overseeing pesticides and toxic chemicals until last month. For more information on today’s episode, visit nytimes.com/thedaily.