I am well aware of what the declaration says. The declaration had to do with the separation from the king and not setting up a constitutional republic. Once the Constitution was established the focus of patriots became maintaining that republic, the Constitution and those freedoms. This means that the people have the right and obligation to remove those who would abrogate the Constitution and those freedoms in order to maintain the union and the Constitution. It might not be easy but it can be done within the framework and walking away from it indicates that the freedoms, the constitutional framework and the republic really are not important to those giving up.
Secession is the last resort...simply the threat may be effective enough.....