I was just reading that senators hardly ever seem to win an election.
Why is this?
Typically, it comes down to the stack of material that can be easily spun against the Senator due to their voting record. That is why you see the jabs at McCain from Romney. "How can you be a candidate for change when you've been a part of the problem for so many years?" That kind of stuff. Additionally, Governors, Mayors, Generals, and Lawyers had positions where they had to act and make decisions on the execution side of the decision-making process. Their "action" tends to weigh more in their favor than those that make laws.