Answer:
He claims that free states will eventually become hateful, deadly, and hostile towards slave states.
Step-by-step explanation:
John C. Calhoun´s last speech to the Senate was during the debate about the Compromise of 1850.
Calhoun opposed the admission of California as a free state, warning about the North´s unfair exclusion of the South from new territories pushing the South to secede, by highlighting the growing hostility.