Answer: The treaty added an additional 525,000 square miles to United States territory, including the land that makes up all or parts of present-day Arizona, California, Colorado, Nevada, New Mexico, Utah and Wyoming. Mexico also gave up all claims to Texas and recognized the Rio Grande as America's southern boundary
Explanation:
Southern plantation owners:
<span>The Fugitive Slave Act had proven and needed the authorities to return fugitive slaves to the slaves masters. This only made the slave owners have more pros rather than cons</span>
