There are a number of verses in the Bible that say that God is "not partial" (Deuteronomy 10:17) or that he "shows no partiality" (Romans 2:11, ESV).  How do Calvinists square such verses with their doctrine of predestination, in which God specifically chooses some people to be saved but not others?

<sub>Related question, but not specific to challenges based on these passages: https://christianity.stackexchange.com/q/33767/21576</sub>