Answer:
When the delegates to the Philadelphia Convention convened in May of 1787 to recommend amendments to the Articles of Confederation, one of the first issues they addressed was the plan for representation in Congress. This question was especially contentious, and kept the delegates embroiled in debate and disagreement for over six weeks. One group of delegates believed that they were not authorized to change the "federal" representational scheme under the Articles of Confederation, according to which the states were equally represented in a unicameral Congress by delegates appointed by the state legislatures. Another group of delegates believed that the current scheme of representation under the Articles of Confederation was flawed and had to be replaced with a better one—a "national" one. The question was finally resolved by the Connecticut Compromise, which resulted in a system of representation that would be "partly national, partly federal," involving a combination of the two kinds of representation.