Well it seems like there is actually a keyword for "Election Jobs" and there are couple of ads about it so I think electionjobs.com is better as it is com and as it is a keyword.
From the given list, it is very obvious that the .com domain name would get the most preferred choice from international community as the other two would be appreciated only by the localized audience! Regards, RightMan
I just purchased a .us domain with a PR3 and pages indexed back to 2002. If extensions besides .com get ranking I would think that any extension promoted properly would rank well. The .com is a familiar extension to most web surfers, perhaps this helps with the trust factor?
I would recommend you to register SearchDomains.us. It will give you benefit in the long run...Other domains are ok, not unique but keyword wise it looks ok.