In high school, Cody Keenan wanted to be an orthopedic surgeon. But a challenging college chemistry course led him to pursue a degree in political science instead. He got his start working in the mailroom for Sen. Ted Kennedy, eventually becoming chief speech writer for President Barack Obama. Cody joined David to talk about the challenges of speech writing, battling imposter syndrome, the joys and frustrations of working in politics, and a whirlwind 10 days chronicled in his new book, “Grace: President Obama and Ten Days in the Battle for America.”To learn more about how CNN protects listener privacy, visit cnn.com/privacyLearn more about your ad choices. Visit podcastchoices.com/adchoices