Question: Who was the president that went into office after the assassination of the previous president and gave his State the Union Address when the American Civil War had ended?

Context articles: 1859 State of the Union Address
Hiester Clymer
1865 State of the Union Address
1864 State of the Union Address
1866 State of the Union Address
1860 State of the Union Address
1987 State of the Union Address
Lenny Skutnik
Andrew Johnson
1863 State of the Union Address

The 1859 State of the Union Address was written by James Buchanan, the 15th President of the United States.
 It was read to both houses of the 36th United States Congress on Monday, December 19, 1859, by a clerk.
 Predicting the American Civil War, he stated, "Whilst it is the duty of the President "from time to time to give to Congress information of the state of the Union," I shall not refer in detail to the recent sad and bloody occurrences at Harpers Ferry.
 Still, it is proper to observe that these events, however bad and cruel in themselves, derive their chief importance from the apprehension that they are but symptoms of an incurable disease in the public mind, which may break out in still more dangerous outrages and terminate at last in an open war by the North to abolish slavery in the South."
Hiester Clymer (1827 – June 12, 1884) was an American political leader from the state of Pennsylvania.
 Clymer was a member of the Hiester family political dynasty and the Democratic Party.
 He was the nephew of William Muhlenberg Hiester and the cousin of Isaac Ellmaker Hiester.
 Although Clymer was born in Pennsylvania, he was adamantly opposed to Abraham Lincoln's Administration and the Republican party's prosecution of the American Civil War.
 Elected Pennsylvania state senator in 1860, Clymer adamately opposed state legislation that supported the state Republican party's war effort.
 After the American Civil War ended, Clymer unsuccessfully ran for the Pennsylvania Governor's office in 1866 on a white supremacist platform against Union Major-General John W. Geary.
 After his election to the U.S. House of Representatives in 1872 as a Democrat, Clymer would be primarily known for his investigation of Sec.
 William W. Belknap's War Department in 1876.
 Belknap escaped conviction in a Senate trial, since he resigned his cabinet position before being impeached by the House of Representatives.
 Having retired from the House of Representatives in 1881, Clymer served as Vice President of the Union Trust Co. of Philadelphia and president of the Clymer Iron Co until his death in 1884.
The 1865 State of the Union Address was written by the 17th President of the United States, Andrew Johnson.
 It was presented to the United States Congress on Monday, December 4, 1865.
 He stated, "Our thoughts next revert to the death of the late President by an act of parricidal treason.
 The grief of the nation is still fresh.
 It finds some solace in the consideration that he lived to enjoy the highest proof of its confidence by entering on the renewed term of the Chief Magistracy to which he had been elected; that he brought the civil war substantially to a close; that his loss was deplored in all parts of the Union, and that foreign nations have rendered justice to his memory."
 The American Civil War had ended, and now it was time for the Reconstruction era to begin.
The 1864 State of the Union Address was given by Abraham Lincoln, the 16th President of the United States.
 It was presented to the United States Congress on Tuesday, December 6, 1864.
 It was given right before the end of the American Civil War.
 He said, "The war continues.
 Since the last annual message all the important lines and positions then occupied by our forces have been maintained and our arms have steadily advanced, thus liberating the regions left in rear, so that Missouri, Kentucky, Tennessee, and parts of other States have again produced reasonably fair crops.
The 1866 State of the Union Address was given by the United States' 17th President, Andrew Johnson, on Monday, December 3, 1866.
 It was not a spoken address, but a written one.
 The Reconstruction Era had begun, and Johnson wanted a policy that pardoned the Confederates.
 He began with, "In all of the States civil authority has superseded the coercion of arms, and the people, by their voluntary action, are maintaining their governments in full activity and complete operation."
 In the middle, he said,"In our efforts to preserve "the unity of government which constitutes as one people" by restoring the States to the condition which they held prior to the rebellion, we should be cautious, lest, having rescued our nation from perils of threatened disintegration, we resort to consolidation, and in the end absolute despotism, as a remedy for the recurrence of similar troubles."
 The rebellion he is referring to is the American Civil War, which ended in 1865.
The 1860 State of the Union Address was written by James Buchanan, the 15th President of the United States.
 It was read on Monday, December 3, 1860, to both houses of the 36th United States Congress, by a clerk.
 He stated, "Why is it, then, that discontent now so extensively prevails, and the Union of the States, which is the source of all these blessings, is threatened with destruction?"
 He spoke on the eve of the American Civil War.
The 1987 State of the Union address was given by President Ronald Reagan to a joint session of the 100th United States Congress on Tuesday, January 27, 1987.
 The speech was the third State of the Union address of President Reagan's second term, starting out with congratulations to the historic 100th Congress.
 Progressing to the Afghanistan situation, he says: "The Soviet Union says it wants a peaceful settlement in Afghanistan, yet it continues a brutal war and props up a regime whose days are clearly numbered.
 We are ready to support a political solution that guarantees the rapid withdrawal of all Soviet troops and genuine self-determination for the Afghan people."
 He ended with, "But now at length I have the happiness to know that it is a rising and not a setting Sun."
 Well, you can bet it's rising because, my fellow citizens, America isn't finished.
 Her best days have just begun."
Martin Leonard Skutnik III (born 1953 in Mississippi, known as Lenny) is an American former employee of the Congressional Budget Office.
 He is notable for an act of heroism which led to him being mentioned by President Ronald Reagan in the State of the Union Address, which coined the term "Lenny Skutnik" referring to notable people who are invited to sit in the gallery at a State of the Union address or other joint meeting of Congress.
 Skutnik has held various jobs as a painter, supermarket porter, and cook for the Burger Chef restaurant chain.
 He has also worked in a meat packing plant and in a furniture factory.
Andrew Johnson (December 29, 1808 July 31, 1875) was the 17th President of the United States, serving from 1865 to 1869.
 Johnson became president as he was vice president at the time of the assassination of Abraham Lincoln.
 A Democrat who ran with Lincoln on the National Union ticket, Johnson came to office as the Civil War concluded.
 The new president favored quick restoration of the seceded states to the Union.
 His plans did not give protection to the former slaves, and he came into conflict with the Republican-dominated Congress, culminating in his impeachment by the House of Representatives.
 He was acquitted in the Senate by one vote.
The 1863 State of the Union Address was written by the 16th President of the United States, Abraham Lincoln, and delivered to the United States Congress, on Tuesday, December 8, 1863, amid the ongoing American Civil War.
 He said, "The efforts of disloyal citizens of the United States to involve us in foreign wars to aid an inexcusable insurrection have been unavailing."
 He is referring to the citizens of the Confederate States of America.
 He ended with, "The movements by State action for emancipation in several of the States not included in the emancipation proclamation are matters of profound gratulation."