Complex sentence: Calhoun, along with President Polk and Secretary of State James Buchanan, continued work on the treaty while he was a senator, and it was ratified by a vote of 41-14 on June 18,1846.
Split into simpler sentences: Calhoun, along with President Polk and Secretary of State James Buchanan, continued work on the treaty while he was a senator. It was ratified by a vote of 41-14 on June 18,1846.