I'm going to guess that is an "it depends" point. For a casino parking lot? You are right - conservatives will say "pay the price the landowner wants, or build around them." But a hospital or hospital expansion might cause the opposite, especially if the landowner is unyielding, won't move for ANY amount of money.
Do you think eminent domain is a big issue to the voters? If yes, do they also think the president of the US is in charge of eminent domain?
I do not think it is a big issue, and it is mostly a local or state issue. However, the candidates attitude toward eminent domain abuse reflects on his/her attitude toward big government, individual liberties, and justice. So it is telling.