You will need the exact citation for an academic paper, but look for the Thomas Jefferson quote about the “Tree of Liberty must be refreshed from time to time by the blood of patriots and tyrants” indicating that tyranny might arise that would rquire another revolution.
Surprised you hadn’t heard about that one as it is cited often on conservative websites.
Alexis de Toqueville’s many volumes on the American experiment should produce something as well.
I am using Locke as my supporting evidence. I need a detractor. My class involves the study of Rousseau, Machiavelli, and Locke.