Now the Democratic Party politician portrays himself as the only candidate who can ensure this never happens again. He has said he will change the constitution to make it more difficult for future presidents to declare martial law.
"These strategic bombers are capable of launching long-range strikes against us," he said. "There are only 120 of them and we struck 40. That's an incredible figure."It is hard to assess the damage, but Ukrainian military blogger Oleksandr Kovalenko says that even if the bombers, and command and control aircraft were not destroyed, the impact is enormous.
"The extent of the damage is such that the Russian military-industrial complex, in its current state, is unlikely to be able to restore them in the near future," he wrote on his Telegram channel.The strategic missile-carrying bombers in question, the Tu-95, Tu-22, and Tu-160 are, he said, no longer in production. Repairing them will be difficult, replacing them impossible.The loss of the supersonic Tu-160, he said, would be especially keenly felt.
"Today, the Russian Aerospace Forces lost not just two of their rarest aircraft, but truly two unicorns in the herd," he wrote.Beyond the physical damage, which may or may not be as great as analysts here are assessing, Operation Spider's Web sends another critical message, not just to Russia but also to Ukraine's western allies.
My colleague Svyatoslav Khomenko, writing for the BBC Ukrainian Service website, recalls a recent encounter with a government official in Kyiv.
The official was frustrated.He failed, because of resistance from the public and politicians, and was impeached, triggering this snap election to choose his successor.
But the chaos Yoon unleashed that night has festered.While stuck in limbo, without a president, the country has become more polarised and its politics more violent.
At street protests earlier this year it became commonplace to chant for various political leaders to be executed. And since launching his presidential bid, Lee has been receiving death threats, and his team say they have even uncovered a credible plot to assassinate him.This election is an opportunity to steer South Korea back onto safer, more stable ground, and heal these fractures.