Only on the "CBS This Morning" podcast, former National Security Adviser Susan Rice joins co-host Gayle King to discuss her memoir, "Tough Love: My Story of the Things Worth Fighting For." Rice discusses the impact her parents' tumultuous marriage and their high standards for her had on her development and drive for success. Plus, she shares why she made the then-risky decision to back Barack Obama in the 2008 primary against Hillary Clinton after she had served in President Clinton?s administration. Plus, she comments on the largest national security risks our country faces today, whether she would ever seek elected office and why she remains optimistic about the future of American politics.