The Electoral College reflects the Senate's composition, with its emphasis on land mass rather than population.  This can be changed.

The Senate, created in the Great Compromise that kept southern slaveholders in the Union, was elected by the state legislatures.  The elimination of the direct role of the people in electing the Senate was not rectified until the 17th amendment was ratified in 1913. 

Perhaps the article's writers would happily defend the corruption of pre-1913 choice of Senators as much as they do the use of 3/5 of the slave population to amplify slaveholder representation in the House and thus the Electoral College.

They misleadingly omit Lincoln's overwhelming plurality of the popular vote -- more than twice his leading competitor.

It's worth noting that now that the African-American vote is suppressed "with almost surgical precision," as a Federal Appeals Court wrote this year.  But they now contribute a full 5/5 of the census, rather than 3/5 as in slavery times.