when did the president start choosing the vice president
Running mate The practice of a presidential candidate having a running mate was solidified during the American Civil War. In 1864, in the interest of fostering national unity, Abraham Lincoln from the Republican Party (popular in the North) and Andrew Johnson of the Democratic Party (popular in the South) were co-endorsed and ran together for President and Vice-President as candidates of the National Union Party. Notwithstanding this party disbanded after the war ended, with the result that Republican Lincoln was succeeded by Democrat Johnson; the states began to place candidates for President and Vice-President together on the same ballot ticket - thus making it impossible to vote for a presidential candidate from one party and a vice-presidential candidate from another party, as had previously been possible.