What would have happened if the Wilmont Proviso passed?

If the Wilmot Proviso had passed, it would have prohibited slavery in any territory acquired from Mexico after the Mexican-American War. This would have intensified sectional tensions between the North and South, potentially leading to earlier conflicts over slavery and statehood. The balance of power in Congress would likely have shifted, favoring free states, which could have altered the trajectory of events leading to the Civil War. Ultimately, the Proviso's passage might have delayed or changed the nature of the conflict over slavery in the United States.