Because of the electoral college and the way it favors smaller states (put in place by the slave-holding state to prevent the rest of the nation from getting rid of their ability to own slaves) the GOP always has an advantage

Correct me if I am wrong but surely the slave holding states overwhelmingly supported the Democratic party and the Republicans emerged to combat the spread of slavery into the western territories. If the Southern Democrats put in a system to maintain their advantage, then the Democratic party can't complain if the pendulum has swung the other way towards the GOP.

DC