[ WP ] Tell me the story of a publicly hated hero fighting a much beloved villian

I remember when I first discovered my power. I was only a kid, I think I was about 12 or so. I was playing with Lizzy during recess, when I saw this man across the street. There was nothing notable about him, not tall but not short, not fat but not skinny, no really distinguishable features about him, except for this... aura. It was like a shadow but three dimensional, and it completely surrounded him. I thought nothing of it at the time, until three days later when Lizzy went missing. She just dissapeared, and everyone went crazy trying to find her, it was a nationwide search, hundreds of thousands of dollars were spent trying to find her, multiple'experts' were consulted on the news and talk shows, each of them with their own theories, rewards were put out, but nothing turned up. Until over a year later when they found her, or at least what was left of her, rotting in a swamp. She'd been kidnapped, raped repeatedly, and finally killed. When they finally arrested the culprit, it was him, that same man I had seen; Only this time I could see more: I could see his crimes, what he had done, what he would have done if he had n't been caught, what he wanted to do, and that he had no regrets about it, he felt no shame. 
 
 It was then that I knew what I could do, what I had to do. I could see a man's evil, the blackness in his soul, how he planned to hurt, to murder, and to destroy. I realized that I could stop it, prevent that from happening, save countless innocent lives. And so I did. I became the living embodiment of the preemptive strike. I wandered the streets day and night, stopping dozens of potential muggers, thieves, rapists, and murderers. I killed them, I had to, it was the only way to completely stop a man's evil, and to keep my identity a secret. My actions quickly became the subject of investigation. Police and reporters alike scurried to find me, to discover who had been killing people all across the state. They've put out BOLOs, PSAs, and rewards regarding me, I'm considered a major public threat, but only I know the truth of what I had done, all the evil I had destroyed, all the lives I had saved, but they could never, would never, understand why. 
 
 The Presidential Elections are coming up. Right now the candidate with the most public support is Senator John Armstrong. The people, and the media, love him. He's young, clearly intelligent, handsome, and above all else, has shown the kind of passion and energy that people have n't seen in a long time, the kind that makes even his opposition want to believe in him. I was actually a supporter of his for a while, I liked his enthusiasm, and the fact that he seemed to have more common sense than any other politician had shown in decades. I even went to one of his public appearances, and that's when I saw it. His aura was black, pure and vile. In it I saw thousands, millions, of dead, starvation, war crimes, corruption, blackmail, bribes, bigotry, and dozens of other atrocities. He would start a war, a big one, countless lives would be loss, homes would be destroyed, any suspected enemy would be captured and tortured, the nuclear option would be used, liberally. The world as we know, would be irreparably damaged. 
 
 I know what I have to do. I know that even if I am successful I will be caught. I will be tried, found guilty, and executed. And I accept that. I will make a hated sacrifice, go down in history as a monster, and be forever despised. And I will do it willingly, gladly, and without remorse. Because it is who I am, it is what I was meant for, I am The Judge.
