Answer: Lincoln's vice presidential candidate was Andrew Johnson.
Explanation: In the United States presidential elections of 1864, the two presidential candidates were Abraham Lincoln, who represented the National Union Party, and George McClellan, who was part of the Democratic Party. Lincoln's vice presidential candidate was Andrew Johnson, who had been Governor of Tennessee in the 50s. Abraham Lincoln won the elections; however, he was assassinated a few months after. As a result, Andrew Johnson took his place and became the president of the United States from 1865 to 1869.