after that, demo bar -- dan lamarr discusses the j helm 15 military exercises. plus, your phone calls, facebook comments come into tweets. "washington journal" is live at 7:00 a.m. eastern each morning on c-span. >> presidential candidates often release books to introduce themselves to voters. here's a look at some recent books written by declared and potential candidates for president. former secretary of state hillary clinton looks back on her time serving in the obama administration in "hard choices." in "american dreams," marco rubio outlines his plan to restore economic opportunity. i cut the begin systemic on politics and culture in "god and guns, grits, and gravy." and in "blue-collar conservatives," rick santorum argues that the republicans must focused on the working class to retake the white house. in "a fighting chance," elizabeth warren recounts the events in her life that shaped her career as an educator and politician. scott walker argues that republicans must offer old solutions to fix the country and have the courage to implement them in "an inti