I don't believe we can successfully legislate morality at the ballot box, therefore I will focus on a candidate's positions on economic development, homeland security, and crime prevention above all other factors. Yes it would be nice if the candidate was against abortion in general, but I'd accept a compromise of being against partial-birth abortion and allowing some parental notification. Politics is the art of compromise.
Of course we legislate morality all the time. Stealing, killing, slavery, pedophilia, rape; those are all "morality" issues. Shall we ignore them too? Or should we ignore just the "morality issues" you don't care about?
Sure we can, and we always have. Laws against immoral acts such as murder, rape, theft, fraud, perjury, child abuse, etc, are the result of legislation enacted by people who were chosen at the ballot box. Laws against immoral acts such as abortion and homosexual marriage are just as legitimate as those I mentioned previously.