Why did King John argue with the pope?

When Archbishop of Canterbury Hubert Walter died on 13 July 1205. The Canterbury Cathedral chapter claimed the sole right to elect Hubert's successor and favoured Reginald. John wanted John de Graham, one of his own men, so he could influence the church more. When their dispute could not be settled, the Chapter secretly elected one of their members as Archbishop. A second election imposed by John resulted in another nominee. When both of these elected arch-bishops arrived in Rome, Pope Innocent III rejected both of them, and elected Stephen Langton to the post. Langton was not accepted by John, the Barons nor the Bishops. Innocent placed the English Kingdom under interdict and excommunicated John. The dispute was finally ended in 1213 when John finally submitted to the Pope.