William Henry Seward (May 16, 1801 – October 10, 1872) was the 12th Governor of New York, United States Senator and the United States Secretary of State under Abraham Lincoln and Andrew Johnson. A determined opponent of the spread of slavery in the years leading up to the American Civil War, he was a dominant figure in the Republican Party in its formative years, and was widely regarded as the leading contender for the party's presidential nomination in 1860 – yet his very outspokenness may have cost him the nomination. Despite his loss, he became a loyal member of Lincoln's wartime cabinet, and played a role in preventing foreign intervention early in the war. On the night of Lincoln's assassination, he survived an attempt on his life in the conspirators' effort to decapitate the Union government. As Johnson's Secretary of State, he engineered the purchase of Alaska from Russia in an act that was ridiculed at the time as "Seward's Folly", but which somehow exemplified his character. His contemporary Carl Schurz described Seward as "one of those spirits who sometimes will go ahead of public opinion instead of tamely following its footprints."

William Howard Taft (September 15, 1857 – March 8, 1930) was the 27th President of the United States (1909–1913) and later the tenth Chief Justice of the United States (1921–1930). He is the only person to have served in both of these two offices.

Before becoming President, Taft was selected to serve on the Ohio Superior Court in 1887. In 1890, Taft was appointed Solicitor General of the United States and in 1891 a judge on the United States Court of Appeals for the Sixth Circuit. In 1900, President William McKinley appointed Taft Governor-General of the Philippines. In 1904, President Theodore Roosevelt appointed Taft Secretary of War in an effort to groom Taft, then his close political ally, into his handpicked presidential successor. Taft assumed a prominent role in problem solving, assuming on some occasions the role of acting Secretary of State, while declining repeated offers from Roosevelt to serve on the Supreme Court.

Riding a wave of popular support for fellow Republican Roosevelt, Taft won an easy victory in his 1908 bid for the presidency.

Abraham Lincoln ⁱ/ˈeɪbrəhæm ˈlɪŋkən/ (February 12, 1809 – April 15, 1865) was the 16th President of the United States, serving from March 1861 until his assassination in April 1865. He successfully led his country through its greatest constitutional, military and moral crisis – the American Civil War – preserving the Union while ending slavery, and promoting economic and financial modernization. Reared in a poor family on the western frontier, Lincoln was mostly self-educated. He became a country lawyer, a Whig Party leader, Illinois state legislator in the 1830s, and a one-term member of the United States House of Representatives in the 1840s. After a series of debates in 1858 that gave national visibility to his opposition to the expansion of slavery, Lincoln lost a Senate race to his arch-rival Stephen A. Douglas. Lincoln, a moderate from a swing state, secured the Republican Party nomination. With almost no support in the South he swept the North and was elected president in 1860. His election was the signal for seven southern slave states to declare their secession from the Union and form the Confederate States of America. The departure of the Southerners gave Lincoln's party firm control of Congress, but no formula for compromise or reconciliation was found. And the war came.

Doris Kearns Goodwin (born Doris Helen Kearns; January 4, 1943) is a Pulitzer Prize-winning American biographer, historian, and an oft-seen political commentator. She is the author of biographies of several U.S. Presidents, including Lyndon Johnson and the American Dream; The Fitzgeralds and the Kennedys: An American Saga; No Ordinary Time: Franklin and Eleanor Roosevelt (which won the Pulitzer Prize for History in 1995); and her most recent book, Team of Rivals: The Political Genius of Abraham Lincoln.

Doris Kearns was born in Brooklyn, New York, and grew up in Rockville Centre, New York. She attended Colby College in Maine, where she was a member of Tri Delta and Phi Beta Kappa and graduated magna cum laude in 1964 with a Bachelor of Arts degree. She was awarded a Woodrow Wilson Fellowship in 1964 to pursue doctoral studies. In 1968 she earned a Ph.D. in government from Harvard University, with a thesis entitled "Prayer and Reapportionment: an Analysis of the Relationship between the Congress and the Court."^{[citation needed]}