USA HISTORY

Detailed explanation-1: -In 1814, Buchanan was elected to the Pennsylvania House of Representatives as a member of the Federalist Party. In 1820, he was elected to the U.S. House of Representatives as a Republican-Federalist. He changed his party affiliation to Democratic following the dissolution of the Federalist Party.

Detailed explanation-2: -James Buchanan, the 15th President of the United States (1857-1861), served immediately prior to the American Civil War. He remains the only President to be elected from Pennsylvania and to remain a lifelong bachelor.

Detailed explanation-3: -Virtually his entire foreign policy was focused on strengthening the influence of the United States in nations to the south of it. He told Congress in 1858, “It is, beyond question, the destiny of our race to spread themselves over the continent of North America."

Detailed explanation-4: -Answer and Explanation: Abraham Lincoln served as president immediately after James Buchanan. Lincoln won the Election of 1860 with a plurality of the vote and without the support of a single southern state. Lincoln’s victory resulted in the south seceding from the Union and the CIvil war from 1861 to 1865.