Indeed Virginia was a slave state at the time, and was later part of the Confederacy, and it was the most underrepresented state in the Senate and electoral college at the founding, since those bodies cause higher population states to be underrepresented relative to their population.
> The states that eventually joined the confederacy are different from those that had legalized slavery when the Constitution was signed.
All of the states had legalized slavery when the Constitution was signed. But it was already gathering detractors even then. The states that wanted to keep it the most were the ones that ended up in the Confederacy and they were both a minority of the original colonies and a minority of the states at the time of the civil war.
Indeed Virginia was a slave state at the time, and was later part of the Confederacy, and it was the most underrepresented state in the Senate and electoral college at the founding, since those bodies cause higher population states to be underrepresented relative to their population.
> The states that eventually joined the confederacy are different from those that had legalized slavery when the Constitution was signed.
All of the states had legalized slavery when the Constitution was signed. But it was already gathering detractors even then. The states that wanted to keep it the most were the ones that ended up in the Confederacy and they were both a minority of the original colonies and a minority of the states at the time of the civil war.