Why do you think John L. O'Sullivan mentions Texas' future representation in congress?

John L. O'Sullivan mentions Texas' future representation in Congress to highlight the significance of its annexation and the potential for expanding American influence and power. By emphasizing Texas as a future state, he underscores the idea of Manifest Destiny, suggesting that the U.S. has a divinely ordained mission to expand its territory and democratic ideals. This also reflects the political and strategic importance of Texas in shaping the balance of power within the federal government.