Dow falls 139 points and S&P drops 0.9 percent. Investors wait for direction from Friday's employment numbers.
Fort Sumter marked the start of the Civil War, with Confederates shelling it on April 12, 1861. Today, the cannon rolls still reverberate in a country that remains at peace, but torn by ideological divides.
Dow Jones falls 88 points after falling nearly 180 points. Stocks on S&P and Nasdaq also pare losses at the close.
President Obama visited Mumbai, India, Saturday and made a forceful case for free trade. He announced deals totaling nearly $10 billion in new US exports that are expected to create 50,000 new jobs.