Considering that users will use the candidates past site activity as a way to judge them.
- What if a candidate was only active 2 years ago, but then his activity started to decline?
- What if he was only active few months before the election?
- What if his activity is only limited to couple of months in each year?
I think it would be nice to see their activity on a graph with relation to time, so we know when he was active.