Odds of Getting In
It's a simple question: can you get a majority (or plurality) of voters in your state to pick you instead of the other candidate(s). If yes, then congratulations! If not, well, there's always the House of Representatives. If you want to increase the odds, you might move to a state with a smaller population. Each state gets only two Senators, so the odds in Delaware or Wyoming will be a lot more favorable than in California or Texas.