Why did Joseph Addison and Richard Steele become estranged near the end of Addison's life?

Joseph Addison and Richard Steele, who shared one of the most famous literary friendships of their time, became estranged during the final year of Addison's life due to a political disagreement.12

The rift was caused by a dispute over a bill intended to restrict the peerage. Addison and Steele took opposing sides on this legislative issue, which led to a cooling of their relationship and a final estrangement shortly before Addison's death in 1719.12