state laws and customs upheld the constitutional amendments
Not entirely sure what you mean by this unless you mean specific interpretations of the constitution, which is considered judicial review which was established in Marbury v Madison, also known as an informal amendment.
On January 29, 1850, the 70-year-old Clay presented a compromise. For eight months members of Congress, led by Clay, Daniel Webster, Senator from Massachusetts, and John C. Calhoun, senator from South Carolina, debated the compromise. With the help of Stephen Douglas, a young Democrat from Illinois, a series of bills that would make up the compromise were ushered through Congress.
<span>According to the compromise, Texas would relinquish the land in dispute but, in compensation, be given 10 million dollars -- money it would use to pay off its debt to Mexico. Also, the territories of New Mexico, Nevada, Arizona, and Utah would be organized without mention of slavery. (The decision would be made by the territories' inhabitants later, when they applied for statehood.) Regarding Washington, the slave trade would be abolished in the District of Columbia, although slavery would still be permitted. Finally, California would be admitted as a free state. To pacify slave-state politicians, who would have objected to the imbalance created by adding another free state, the Fugitive Slave Act was passed.</span>
