Former President Barack Obama’s new memoir “A Promised Land” is full of takedowns of political rivals, including Sen. Lindsey Graham (R-SC). Subscribe to HuffPost today: http://goo.gl/xW6HG Support our work: https://www.huffpost.com/subscribe Read: https://www.huffpost.com/ Like: https://www.facebook.com/HuffPost Follow: https://twitter.com/huffpost