As Democrats hope to secure a majority in one, potentially both chambers of Congress, the rise of their left flank is in focus.

Democratic Socialists of America say they're fighting for a democracy powered by everyday people, not capitalists.

DSA members are now some of the most prominent voices in the Democratic Party, occupying roles from the Halls of Congress to the mayor's mansion in New York City."For a long time, they were completely irrelevant," said Lincoln Mitchell, a political expert at Columbia University.