what is meant by the basic principal popular sovereignty?

the government is set up as a constitutional republic
the people have the rights the alter their government
congress has the right to regulate trade
the president has the right to veto any bill that the congress has passed

The basic principle of popular sovereignty refers to the idea that the power and authority of the government ultimately reside in the hands of the people. This means that the people hold the power to govern themselves, either directly or through elected representatives. It emphasizes the idea of the government's legitimacy and authority being derived from the consent of the governed.