Warning: this episode contains some explicit language. When Adidas terminated its multibillion-dollar partnership with Kanye West over his antisemitic and other offensive public remarks, it seemed like a straightforward story of a celebrity’s suddenly imploding. But a New York Times examination has found that, behind the scenes, the collaboration was fraught from the start. Megan Twohey, an investigative reporter for The Times, talks about what she discovered when she delved into the meltdown.