God Hardening Pharaoh's Heart — Unconditional Reprobation? (Exodus 7:3)

Calvinist Claim: God's announcement in Exodus 4:21/7:3 that He WILL harden Pharaoh proves the hardening was predetermined and unconditional — Pharaoh had no say.

God's foreknowledge of Pharaoh's character preceded the hardening. Exodus 3:19 — "I know that the king of Egypt will not permit you to go, except under compulsion." God already knew who Pharaoh was.
Pharaoh hardened himself first. The narrative shows self-hardening (Ex 8:15, 8:32) before divine hardening (Ex 9:12). God's announcement is prospective — describing what He will do with a man He already knows to be stubborn.
God explains HOW He hardens — through circumstances, not by overriding Pharaoh's will. Exodus 14:1-4 is the clearest example: God directs Israel's movements to make them appear vulnerable, provoking Pharaoh's existing desire to recapture them.
"I raised you up" (Ex 9:16) means "allowed you to remain/stand," not "created you for damnation." God sustained Pharaoh through plagues that would have broken a humble man, precisely because Pharaoh's stubbornness served God's revelatory purpose.

Pharaoh's stubbornness was his own before God intensified it. The boiling water analogy: the same circumstances that harden an egg soften a potato. The heat reveals nature; it does not create it.
God gave Pharaoh every opportunity to repent. Each plague was a demonstration of divine power. Pharaoh's own servants pleaded with him (Ex 10:7). Pharaoh's magicians admitted "This is the finger of God" (Ex 8:19). Pharaoh chose to disregard all of it.
Moses told Pharaoh directly: "You do not yet fear the Lord God" (Ex 9:30). The failure is Pharaoh's refusal to fear God, not God's refusal to enable repentance.
Pharaoh's pursuit of Israel at the Red Sea was voluntary — God set up circumstances (Ex 14:1-4) but Pharaoh freely chose to chase. God did not override Pharaoh's will; He leveraged Pharaoh's existing will.