Well played has become a cliche, but wow, was this convention well played by Lincoln and his team.
Interesting to notice that both Democrats and Republicans rejected their leading "establishment" candidate, as too radical on slavery & so unacceptable to Southerners.
But Democrats required 2/3 to win and Douglas maxed out at 60% -- Charleston produced no nominee.
Republicans in Chicago also rejected their leading establishment candidate, Seward, as too radical on slavery, but Republicans only required 50% to win, and did not expect any Republican to appeal to Deep South voters -- they only hoped to win some Northern Democrat & Border State votes.
And for that, somehow, "rail-splitter" Lincoln fit the bill.
And, as Catton reports, there were the words of Kentucky's Cassius Clay: