I'm more concerned with is how a particular candidate views the use government's monopoly on force. Will it be constrained to protection and defend individual rights - or unconstrained in attempts to shape and engineer a 'better' humanity?
VR: If this is your concern, then you cannot vote for members of either major party. Democrats believe in redistribution of wealth and income downwards, toward the poor and the middle class. Republicans believe in redistribution of wealth and income upwards, so that more money is concentrated in the hands of the wealthy. Neither party practices laissez-faire economics. There is no advantage in voting Republican as opposed to Democratic, if you are a real conservative. Both parties do the same thing, just in opposite directions. The difference between them is that Republicans pay lip service to laissez-faire economics, while Democrats do not. There is no lesser of two evils here.
May I suggest the Libertarians?