All legislative Powers herein granted shall be vested in a Congress of the United States, which shall consist of a Senate and House of Representatives.
The Populist Party is the answer
The Democratic Party split between moderate Democrats and Radical Democrats (who were for slavery). Douglas was the moderate Democrat candidate. Buchanan represented the angry southerners. 2 political candidates resulted in the Democrats' chances of winning less likely. This resulted in Lincoln winning the Presidency.
Everyone relies on themselves only.