Union Formation Quotes
As this passage makes clear, the Southern States would not accede to a Union unless they had more representation than the larger Northern states. Thus the infamous three-fifths clause. This meant that white slave owners had proportionally more representatives in Congress and more votes in the Electoral College than whites in the Northern States. This artificial majority kept slavery from being abolished until the Civil War.
Dix finally broke with the Democrats over the slavery question and became a Republican.