“In the eighteenth year of King Jehoshaphat of Judah, Jehoram son of King Ahab became king over Israel in Samaria. He reigned twelve years. He did what was evil in the sight of Yahweh, though not like his father and mother. He removed the pillar of Baal that his father had made. Nevertheless he clung to the sin of King Jeroboam son of Nebat, which he had caused Israel to commit. He did not depart from it.”
There is a problem with dating here since King Jehoram took over in either the 18th year of King Jehoshaphat or was it the 2nd year of King Jehoram in Judah, as in chapter 1. Remember he was the brother of King Ahaziah who ruled for 2 years. He ruled for about 12 years. King Jehoram of Israel was evil, but not as bad as his parents, King Ahab and Jezebel. However, he was like King Jeroboam in causing Israel to sin.
Eugene Finnegan Bible Project 