calm
In my own personal rating of the Presidents I've rated Johnson dead last, mainly for his undermining of Abraham Lincoln's vision of reconstruction and its lasting historical affects, though I concede that he was wrongly impeached. Johnson's presidency is perhaps best encapsulated in this summary of his biography in the American Presidents Series by Harvard professor Annette Gordon-Reid:
"Andrew Johnson never expected to be president. But just six weeks after becoming Abraham Lincoln's vice president, the events at Ford's Theatre thrust him into the nation's highest office.
Johnson faced a nearly impossible task to succeed America's greatest chief executive, to bind the nation's wounds after the Civil War, and to work with a Congress controlled by the so-called Radical Republicans. Annette Gordon-Reed, one of America's leading historians of slavery, shows how ill-suited Johnson was for this daunting task. His vision of reconciliation abandoned the millions of former slaves (for whom he felt undisguised contempt) and antagonized congressional leaders, who tried to limit his powers and eventually impeached him.
The climax of Johnson's presidency was his trial in the Senate and his acquittal by a single vote, which Gordon-Reed recounts with drama and palpable tension. Despite his victory, Johnson's term in office was a crucial missed opportunity; he failed the country at a pivotal moment, leaving America with problems that we are still trying to solve."
Johnson almost didn't become President. Johnson was supposed to be assassinated on the same night Lincoln. He escaped attack when his would-be assassin, George Atzerodt, failed to go through with the plan and got drunk instead. Johnson had been nominated as the vice presidential candidate in 1864 on the National Union Party ticket as part of Lincoln's plan to show unity and to show that he was first and foremost concerned with preserving the union, even above ending slavery. Johnson was a pro-union man, and remained one even after the war began. But he was also in favour of slavery. He and Lincoln were elected in 1864, inaugurated in early 1865 (Johnson showed up drunk at his inauguration according to many reports) and a month later Johnson assumed the presidency upon Lincoln's assassination.
As president, Johnson implemented his own form of Presidential Reconstruction, a series of proclamations directing the seceded states to hold conventions and elections to re-form their civil governments. It wasn't the reconstruction that Lincoln had articulated and certainly not the one the abolitionist "Radical Republicans" had in mind. These proclamations along with Johnson's rush to bring the former Confederate states back into the union without due regard for freedmen's rights and his vetoes of civil rights bills embroiled him in a bitter dispute with the Radical Republicans who became infuriated with Johnson's lenient policies. The Radicals in the House of Representatives impeached him in 1868 (a first for a U.S. president), charging him with violating the Tenure of Office Act, when he sought to remove his Secretary of War without Senate approval. His trial in the Senate ended in an acquittal by a single vote.
After his term as President ended, Johnson traveled extensively throughout the country to reiterate his views, especially on reconstruction. He campaigned for re-election to the U.S. Senate in 1869, but lost by a narrow margin. In 1872 he ran for election to fill Tennessee's new at–large seat in the House of Representatives. He lost in this election as well. In 1873 Johnson contracted cholera during an epidemic but soon recovered. He also suffered financial losses of about half of his assets when the First National Bank went under. In 1874, the Tennessee legislature elected him over five other candidates to the U.S. Senate. In his first and last speech in the Senate, Johnson spoke eloquently in opposition to President Ulysses Grant's military intervention between rival governments in Louisiana. He is the only former president to serve in the Senate after serving as president.
During a Congressional recess, Johnson died from a stroke near Elizabethton, Tennessee, on July 31, 1875. When he was buried, his body wrapped in an American flag and a copy of the U.S. Constitution was placed under his head, according to his wishes.