The correct answer to this open question is the following.
The case that is referred to in this question is the following. "State should base the voting rules for each state vs. Congress setting voting rules in the whole country.
This became one of the main issues during the Constitutional Convention that most divided the delegates. Who should have more power, the federal government or the states?
Twelve states sent their delegates to the Constitutional Convention in Philadelphia, Pennsylvania, from May to September 1787. The idea was to analyze the Articles of Confederation and to make the proper changes due to the fact that the Articles of Confederation had left a weak central government in the hands of Congress. This issue divided the delegates that argued and debated over the issue of power. In the end, the Constitution established a division of powers in the federal government under a system of checks and balances. The states were sovereign but had to respect the supreme law of the nation.