If wed had a leader of Trumps ability we would have ended slavery without the need for 800,000 young men to die.
4. That the maintenance inviolate of the rights of the states, and especially the right of each state to order and control its own domestic institutions according to its own judgment exclusively, is essential to that balance of powers on which the perfection and endurance of our political fabric depends; and we denounce the lawless invasion by armed force of the soil of any state or territory, no matter under what pretext, as among the gravest of crimes.
A more appropriate response to Ft. Sumter would have been to send a contingent of marines to retake it and closed Charleston harbor, not to invade Virginia.
But, yes, that is 20-20 hindsight.