First, it doesn’t matter how you feel about Sen. Clinton, you have to agree that she has persistence and tenacity. While the majority of pundits wrote Sen. Clinton off months ago, she is blocking, tackling, and clawing her way to the finish line. I would argue that the most important characteristic of a successful entrepreneur is persistence and stamina. And after 18 months in this campaign, she has outlasted quite a few other candidates – and she still wakes up every day acting like a winner.