Popular sovereignty and federalism are important to the constitution because they both say that the people give the government its authority. This principal was important because they wanted the government to be subject to the law not above it.
We understand <em>popular sovereignty</em> as the concept in which political power rests with the people who can create, alter and abolish government. People express themselves through voting and free participation in government.
And <em>federalism</em> stands for the sharing of power between federal and state government.
First amendment freedom of speech and religion, 4th the right to be secure in their persons houses papers and documents, and 19th gave women the right to vote