If I, being an agnostic, were to run for president, what would my chances be?

As long as you were Human, didn't try to destroy or rule the world as we know it and shove your beliefs down my throat, I'd vote for you. Your chances would still be very slim though. You'd probably get more votes saying that you were an all powerful robot sent from "God" himself to take over the world and rid it of all evil. Even if that means murdering millions upon millions of non-believing people. So long as "God" sent you all would be well. LOL