I vote with my conscience. I am sure that my conscience, having been raised with Torah ideals, is secure enough to pick a candidate who most rabbonim would agree is a good choice. I do not require a Rov to tell me how to think, B”H. I do require a Rov to tell me how to be mekayeim mitzvos in which I do not know the clear derech. That is why I ask Shailas from time to time.
But my Rov’s political beliefs do NOT have to necessarily be in concert with my own, though they MIGHT be. He could be a political Liberal and I might be a Conservative. So should I follow his liberal views and ascribe them to Halachic mandates???? (FTR, my Rov is not so liberal these days).
Rationally thinking adults can all arrive at the same conclusion without the need for a Rov to decide for them, though a discussion with him could surely help concretize our own thoughts, and I think that can be a good thing.
If we read the paper, listen to the candidates as they debate, look at their voting record, etc. we can make up our own minds. I do not believe that it is a given that all political decisions should be in the purview of Rabbonim. If they are politically aware, they can surely help to guide the thought process, but that is a far cry from demanding absolute fealty to their opinion and calling it Halacha.