Often, when one debates the Reformed vs. non-Reformed interpretation of the hardening of Pharaoh's heart, what is often overlooked is that both sides are half-correct. Yes, the non-Reformed reading is correct, up to a point--Pharaoh, of his own will, hardened his heart. Notwithstanding, the Calvinists are correct in arguing that God also hardened Pharaoh's heart. However, the full picture is that upon Pharaoh hardening his heart, God further hardened his heart to increase his just condemnation in the age to come (cf. Alma 14:11). That this is the proper interpretation of Pharaoh and the hardening of his heart can be seen in D&C 105:27:
And I will soften the hearts of the people, as I did the heart of Pharaoh, from time to time, until my servant Joseph Smith, Jun., and mine elders, whom I have appointed, shall have time to gather up the strength of my house.
While the focus is on the softening of Pharaoh's heart, no Latter-day Saint would argue that the people God promised to interact with could reject God's calling of them--there would still be a synergy between God and those whose hearts they are softening or hardening.
For a discussion of the flaws in Reformed theology, see:
