As the debate over slavery continued, Andrew Jackson's Democratic Party grew in power and became the voice of the South. Northerners organized themselves to form the Republican Party, taking on the name of Jefferson's old party. Today, it sounds weird to have a Democratic majority in the South and a Republican majority in the North, but that just shows how the names of parties have shifted over the years. With the tension between pro-slavery Democrats and mostly anti-slavery Republicans growing, the nation turned its attention to a Senate race in Illinois between Stephen Douglas and an unknown lawyer named Abraham Lincoln. Which of the following best describes the difference between the Democratic and Republican parties during the 1800s?
A. Democrats were mostly anti-slavery while Republicans were pro-slavery.
B. Democrats were pro-slavery while Republicans were mostly anti-slavery.
C. Democrats were popular in the North and Republicans were popular in the South.
D. Democrats wanted to have Senate races while Republicans wanted to cancel them.