They didn't have Diebold back then, so it doesn't matter.
Anyway, the point I want to make is that you have to be a total f*up to only serve one term in modern times. Johnson was so bad, for instance, he didn't run for a second term. Ford and Carter, likewise, while GWH Bush was basically coasting off of Reagan but governing like Ford/Dole/McCain/Romney.
If we have a candidate who, at the end of the day, governs with in a consistently conservative manner, then he / she will be reelected. It's that simple; Ronald Reagan drew that map. More importantly, however, is for the president to maintain the consistency so that Congress maintains a conservative bent as well.
The newer conservatives will be more Constitutional, by the way, which may actually seem LESS conservative in many ways but actually lead us to a more consistently American "keep your hands off my money and stop snooping on me" era.